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Climate and Average Weather Year Round in Patna India

In Patna, the wet season is hot, oppressive, and mostly cloudy and the dry season is warm and mostly clear. Over the course of the year, the temperature typically varies from 49°F to 100°F and is rarely below 44°F or above 107°F.

Based on the beach/pool score, the best times of year to visit Patna for hot-weather activities are from mid March to early May and from mid October to early November.

Climate in Patna

warmhotswelteringhotwarmJanFebMarAprMayJunJulAugSepOctNovDecNowNow91%91%15%15%clearovercastprecipitation: 10.1 inprecipitation: 10.1 in0.1 in0.1 inmuggy: 100%muggy: 100%0%0%drydrybeach/pool score: 8.0beach/pool score: 8.01.51.5
Patna weather by month. Click on each chart for more information.

The hot season lasts for 3.0 months, from March 27 to June 26, with an average daily high temperature above 94°F. The hottest month of the year in Patna is May, with an average high of 100°F and low of 79°F.

The cool season lasts for 2.0 months, from December 8 to February 7, with an average daily high temperature below 77°F. The coldest month of the year in Patna is January, with an average low of 50°F and high of 72°F.

Average High and Low Temperature in Patna

Average High and Low Temperature in PatnahotcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°F110°F110°FJan 1071°FJan 1071°FMay 23100°FMay 23100°F49°F49°F80°F80°FMar 2794°FMar 2794°FJun 2694°FJun 2694°FDec 877°FDec 877°F68°F68°F81°F81°F54°F54°F54°F54°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High 72°F79°F90°F98°F100°F97°F91°F91°F90°F88°F83°F75°F
Temp. 59°F67°F77°F86°F89°F89°F85°F85°F84°F80°F71°F62°F
Low 50°F56°F65°F73°F79°F81°F81°F81°F79°F72°F61°F52°F

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in Patna

Average Hourly Temperature in PatnaJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMNowNowcoldcoldcoolcoolcoolcoolwarmhotswelteringhotcomfortablecomfortablecold
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Tennant Creek, Australia (4,545 miles away) is the far-away foreign place with temperatures most similar to Patna (view comparison).

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In Patna, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.

The clearer part of the year in Patna begins around September 25 and lasts for 8.7 months, ending around June 17.

The clearest month of the year in Patna is May, during which on average the sky is clear, mostly clear, or partly cloudy 88% of the time.

The cloudier part of the year begins around June 17 and lasts for 3.3 months, ending around September 25.

The cloudiest month of the year in Patna is August, during which on average the sky is overcast or mostly cloudy 82% of the time.

Cloud Cover Categories in Patna

Cloud Cover Categories in PatnaclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%May 891%May 891%Aug 415%Aug 415%Sep 2552%Sep 2552%Jun 1755%Jun 1755%NowNowclearovercastmostly clearpartly cloudy
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.
FractionJanFebMarAprMayJunJulAugSepOctNovDec
Cloudier 14%13%15%13%12%44%80%82%61%20%12%14%
Clearer 86%87%85%87%88%56%20%18%39%80%88%86%

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Patna varies very significantly throughout the year.

The wetter season lasts 3.5 months, from June 11 to September 25, with a greater than 31% chance of a given day being a wet day. The month with the most wet days in Patna is July, with an average of 18.6 days with at least 0.04 inches of precipitation.

The drier season lasts 8.5 months, from September 25 to June 11. The month with the fewest wet days in Patna is November, with an average of 0.7 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Patna is July, with an average of 18.6 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 61% on July 13.

Daily Chance of Precipitation in Patna

Daily Chance of Precipitation in PatnawetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jul 1361%Jul 1361%Dec 41%Dec 41%Jun 1131%Jun 1131%Sep 2531%Sep 2531%NowNowrain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain 1.6d2.0d1.4d1.8d4.4d11.3d18.6d17.4d12.0d4.2d0.7d0.9d

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Patna experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 6.6 months, from April 18 to November 5, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Patna is July, with an average rainfall of 10.1 inches.

The rainless period of the year lasts for 5.4 months, from November 5 to April 18. The month with the least rain in Patna is December, with an average rainfall of 0.2 inches.

Average Monthly Rainfall in Patna

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Rainfall 0.3″0.5″0.2″0.4″1.3″5.8″10.1″8.8″6.3″1.7″0.2″0.2″

The length of the day in Patna varies over the course of the year. In 2024, the shortest day is December 21, with 10 hours, 33 minutes of daylight; the longest day is June 21, with 13 hours, 44 minutes of daylight.

Hours of Daylight and Twilight in Patna

Hours of Daylight and Twilight in PatnaJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2013 hr, 44 minJun 2113 hr, 44 minJun 2112 hr, 8 minSep 2212 hr, 8 minSep 2210 hr, 33 minDec 2110 hr, 33 minDec 21nightnightdayNowNow
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.
Hours ofJanFebMarAprMayJunJulAugSepOctNovDec
Daylight 10.7h11.3h12.0h12.8h13.4h13.7h13.6h13.0h12.3h11.5h10.9h10.6h

The earliest sunrise is at 4:57 AM on June 8, and the latest sunrise is 1 hour, 40 minutes later at 6:37 AM on January 13. The earliest sunset is at 4:58 PM on November 30, and the latest sunset is 1 hour, 46 minutes later at 6:44 PM on July 2.

Daylight saving time (DST) is not observed in Patna during 2024.

Sunrise & Sunset with Twilight in Patna

Sunrise & Sunset with Twilight in PatnaJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 84:57 AMJun 84:57 AM6:44 PMJul 26:44 PMJul 2Nov 304:58 PMNov 304:58 PM6:37 AMJan 136:37 AMJan 13daynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2024. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in Patna

Solar Elevation and Azimuth in PatnaJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AM000010101010202020203030303040404040505050606070708000001010101020202020303030304040404050505060606070708041NowNow
northeastsouthwest
Solar elevation and azimuth over the course of the year 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

Moon Rise, Set & Phases in Patna

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

Patna experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 6.8 months, from April 21 to November 14, during which time the comfort level is muggy, oppressive, or miserable at least 25% of the time. The month with the most muggy days in Patna is August, with 31.0 days that are muggy or worse.

The month with the fewest muggy days in Patna is January, with 0.2 days that are muggy or worse.

Humidity Comfort Levels in Patna

Humidity Comfort Levels in PatnamuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 110%Jan 110%100%Aug 18100%Aug 18Apr 2125%Apr 2125%Nov 1425%Nov 1425%NowNowmiserablemiserablehumidhumidcomfortablecomfortabledrydrymuggymuggy
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days 0.2d0.5d1.6d6.2d17.6d26.7d30.9d31.0d30.0d25.5d7.6d0.5d

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Patna experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 7.2 months, from February 12 to September 18, with average wind speeds of more than 6.4 miles per hour. The windiest month of the year in Patna is June, with an average hourly wind speed of 8.3 miles per hour.

The calmer time of year lasts for 4.8 months, from September 18 to February 12. The calmest month of the year in Patna is November, with an average hourly wind speed of 4.4 miles per hour.

Average Wind Speed in Patna

Average Wind Speed in PatnawindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphJun 188.5 mphJun 188.5 mphNov 54.2 mphNov 54.2 mphFeb 126.4 mphFeb 126.4 mphSep 186.4 mphSep 186.4 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph) 5.76.57.47.47.68.38.27.56.44.64.44.9

The predominant average hourly wind direction in Patna varies throughout the year.

The wind is most often from the east for 5.2 months, from April 26 to October 2, with a peak percentage of 66% on August 14. The wind is most often from the west for 6.8 months, from October 2 to April 26, with a peak percentage of 71% on January 1.

Wind Direction in Patna

Wind Direction in PatnaWEWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwesteastnorthsouth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

To characterize how pleasant the weather is in Patna throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit Patna for general outdoor tourist activities are from early February to mid March and from late October to early December, with a peak score in the second week of November.

Tourism Score in Patna

Tourism Score in Patnabest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810108.48.41.71.78.28.26.06.0NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationtourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best times of year to visit Patna for hot-weather activities are from mid March to early May and from mid October to early November, with a peak score in the first week of April.

Beach/Pool Score in Patna

Beach/Pool Score in Patnabest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810108.08.01.51.57.77.72.72.7NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationbeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Temperatures in Patna are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

Time Spent in Various Temperature Bands and the Growing Season in Patna

Time Spent in Various Temperature Bands and the Growing Season in PatnaJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%100%Jan 1100%Jan 1100%Jul 2100%Jul 2NowNowcoldcoolwarmhotswelteringcomfortable
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Growing Degree Days in Patna

Growing Degree Days in PatnaJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F1,000°F1,000°F2,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°F6,000°F6,000°F7,000°F7,000°F8,000°F8,000°F9,000°F9,000°FJan 1190°FJan 1190°FApr 71,800°FApr 71,800°FDec 319,605°FDec 319,605°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences significant seasonal variation over the course of the year.

The brighter period of the year lasts for 2.5 months, from March 26 to June 11, with an average daily incident shortwave energy per square meter above 6.7 kWh. The brightest month of the year in Patna is May, with an average of 7.3 kWh.

The darker period of the year lasts for 2.5 months, from November 10 to January 27, with an average daily incident shortwave energy per square meter below 4.6 kWh. The darkest month of the year in Patna is December, with an average of 4.0 kWh.

Average Daily Incident Shortwave Solar Energy in Patna

Average Daily Incident Shortwave Solar Energy in PatnabrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhMay 187.4 kWhMay 187.4 kWhDec 193.9 kWhDec 193.9 kWhMar 266.7 kWhMar 266.7 kWhJan 274.6 kWhJan 274.6 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Solar Energy (kWh) 4.35.26.37.17.36.45.35.04.95.14.44.0

For the purposes of this report, the geographical coordinates of Patna are 25.594 deg latitude, 85.136 deg longitude, and 174 ft elevation.

The topography within 2 miles of Patna is essentially flat, with a maximum elevation change of 46 feet and an average elevation above sea level of 182 feet. Within 10 miles is essentially flat (171 feet). Within 50 miles contains only modest variations in elevation (1,414 feet).

The area within 2 miles of Patna is covered by artificial surfaces (74%) and cropland (26%), within 10 miles by cropland (65%) and artificial surfaces (22%), and within 50 miles by cropland (92%).

This report illustrates the typical weather in Patna, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There is only a single weather station, Lok Nayak Jayaprakash Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Patna.

At a distance of 5 kilometers from Patna, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.

The station records are corrected for the elevation difference between the station and Patna according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

Please review our full terms contained on our Terms of Service page.