Average Weather in Chilmāri Bangladesh
In Chilmāri, 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 52°F to 94°F and is rarely below 48°F or above 100°F.
Based on the beach/pool score, the best times of year to visit Chilmāri for hot-weather activities are from late March to early May and from mid to late October.
The hot season lasts for 3.3 months, from March 20 to June 28, with an average daily high temperature above 89°F. The hottest day of the year is April 17, with an average high of 94°F and low of 73°F.
The cool season lasts for 1.9 months, from December 9 to February 6, with an average daily high temperature below 76°F. The coldest day of the year is January 12, with an average low of 52°F and high of 72°F.
Average High and Low Temperature
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 Chilmāri, 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 Chilmāri begins around October 3 and lasts for 8.1 months, ending around June 6. On February 17, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 90% of the time, and overcast or mostly cloudy 10% of the time.
The cloudier part of the year begins around June 6 and lasts for 3.9 months, ending around October 3. On July 29, the cloudiest day of the year, the sky is overcast or mostly cloudy 88% of the time, and clear, mostly clear, or partly cloudy 12% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Chilmāri varies very significantly throughout the year.
The wetter season lasts 5.8 months, from April 15 to October 9, with a greater than 36% chance of a given day being a wet day. The chance of a wet day peaks at 70% on July 4.
The drier season lasts 6.2 months, from October 9 to April 15. The smallest chance of a wet day is 2% on December 2.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 70% on July 4.
Daily Chance of Precipitation
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. Chilmāri experiences extreme seasonal variation in monthly rainfall.
The rainy period of the year lasts for 8.3 months, from March 4 to November 13, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around July 6, with an average total accumulation of 10.8 inches.
The rainless period of the year lasts for 3.7 months, from November 13 to March 4. The least rain falls around December 23, with an average total accumulation of 0.2 inches.
Average Monthly Rainfall
The length of the day in Chilmāri varies over the course of the year. In 2018, the shortest day is December 22, 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
The earliest sunrise is at 5:09 AM on June 9, and the latest sunrise is 1 hour, 40 minutes later at 6:49 AM on January 13. The earliest sunset is at 5:10 PM on November 30, and the latest sunset is 1 hour, 46 minutes later at 6:56 PM on July 3.
Daylight saving time (DST) is not observed in Chilmāri during 2018.
Sunrise & Sunset with Twilight
Chilmāri experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 7.2 months, from April 9 to November 16, during which time the comfort level is muggy, oppressive, or miserable at least 25% of the time. The muggiest day of the year is August 2, with muggy conditions 100% of the time.
The least muggy day of the year is January 28, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Chilmāri experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.2 months, from March 21 to August 28, with average wind speeds of more than 6.0 miles per hour. The windiest day of the year is June 27, with an average hourly wind speed of 7.5 miles per hour.
The calmer time of year lasts for 6.8 months, from August 28 to March 21. The calmest day of the year is October 13, with an average hourly wind speed of 4.4 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Chilmāri varies throughout the year.
The wind is most often from the west for 2.4 months, from January 26 to April 8, with a peak percentage of 49% on March 3. The wind is most often from the south for 5.7 months, from April 8 to September 29, with a peak percentage of 66% on July 11. The wind is most often from the north for 3.3 months, from October 17 to January 26, with a peak percentage of 45% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Chilmāri 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 Chilmāri for general outdoor tourist activities are from mid February to late March and from late October to early December, with a peak score in the second week of November.
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 Chilmāri for hot-weather activities are from late March to early May and from mid to late October, with a peak score in the second week of April.
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.
Temperatures in Chilmāri 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
Growing Degree Days
The average daily incident shortwave solar energy experiences some seasonal variation over the course of the year.
The brighter period of the year lasts for 2.5 months, from March 16 to June 1, with an average daily incident shortwave energy per square meter above 6.2 kWh. The brightest day of the year is April 16, with an average of 6.7 kWh.
The darker period of the year lasts for 2.4 months, from November 15 to January 27, with an average daily incident shortwave energy per square meter below 4.6 kWh. The darkest day of the year is December 21, with an average of 4.1 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Chilmāri are 25.556 deg latitude, 89.671 deg longitude, and 79 ft elevation.
The topography within 2 miles of Chilmāri is essentially flat, with a maximum elevation change of 62 feet and an average elevation above sea level of 78 feet. Within 10 miles is essentially flat (115 feet). Within 50 miles contains only modest variations in elevation (4,738 feet).
The area within 2 miles of Chilmāri is covered by grassland (41%), cropland (39%), and shrubs (12%), within 10 miles by grassland (33%) and cropland (28%), and within 50 miles by cropland (43%) and grassland (33%).
This report illustrates the typical weather in Chilmāri, 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, Ishurdi Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Chilmāri.
At a distance of 168 kilometers from Chilmāri, further than our threshold of 150 kilometers, this station is deemed insufficiently nearby to be relied upon as our primary source for temperature and dew point records. Consequently, the station records are blended with interpolated values from NASA's MERRA-2 satellite-era reanalysis , and both are corrected for elevation differences according to the International Standard Atmosphere .
The weight assigned to the MERRA-2 value depends on the distance from Chilmāri to the nearest station, increasing from 0% at 150 kilometers to 100% at 200 kilometers. In this case, the MERRA-2 weight is 27%, making the weight assigned to the weather station 73%.
Time zones for aiports and weather stations are provided by AskGeo.com .