1. WeatherSpark.com
  2. United States
  3. California
  4. Brawley

Average Weather in Brawley California, United States

In Brawley, the summers are sweltering and arid, the winters are cool and dry, and it is mostly clear year round. Over the course of the year, the temperature typically varies from 42°F to 107°F and is rarely below 35°F or above 113°F.

Climate Summary

90%90%64%64%clearovercastprecipitation: 0.8 inprecipitation: 0.8 in0.0 in0.0 inmuggy: 39%muggy: 39%0%0%drydrycomfortablewarmhotswelteringhotwarmbeach/pool score: 7.5beach/pool score: 7.50.50.5JanFebMarAprMayJunJulAugSepOctNovDec
Click on each chart for more information.

Based on the beach/pool score, the best times of year to visit Brawley for hot-weather activities are from early June to late July and from mid August to late September.

Temperature

The hot season lasts for 3.5 months, from June 5 to September 22, with an average daily high temperature above 99°F. The hottest day of the year is July 23, with an average high of 107°F and low of 80°F.

The cool season lasts for 3.1 months, from November 20 to February 24, with an average daily high temperature below 76°F. The coldest day of the year is December 28, with an average low of 42°F and high of 68°F.

Average High and Low Temperature

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.

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

Average Hourly Temperature in BrawleyJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMhotcoldcoolwarmswelteringcomfortablevery cold
The average hourly temperature, color coded into bands: 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 shaded overlays indicate night and civil twilight.

Clouds

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

The clearer part of the year in Brawley begins around April 7 and lasts for 6.9 months, ending around November 4. On September 18, 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 November 4 and lasts for 5.1 months, ending around April 7. On February 20, the cloudiest day of the year, the sky is overcast or mostly cloudy 36% of the time, and clear, mostly clear, or partly cloudy 64% of the time.

Cloud Cover Categories

Cloud Cover Categories in BrawleyclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Sep 1890%Sep 1890%Feb 2064%Feb 2064%Apr 777%Apr 777%Nov 477%Nov 477%clearovercastmostly clearmostly cloudy
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

Brawley does not experience significant seasonal variation in the frequency of wet days (i.e., those with greater than 0.04 inches of liquid or liquid-equivalent precipitation). The frequency ranges from 1% to 10%, with an average value of 5%.

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 10% on February 17.

Daily Chance of Precipitation

Daily Chance of Precipitation in BrawleyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Feb 1710%Feb 1710%Jun 131%Jun 131%Jan 18%Jan 18%Aug 105%Aug 105%Mar 255%Mar 255%rain
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).

Rainfall

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. Brawley experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 3.2 months, from December 6 to March 14, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around February 15, with an average total accumulation of 0.8 inches.

The rainless period of the year lasts for 8.8 months, from March 14 to December 6. The least rain falls around June 13, with an average total accumulation of 0.0 inches.

Average Monthly Rainfall

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 liquid-equivalent snowfall.

Sun

The length of the day in Brawley varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 59 minutes of daylight; the longest day is June 20, with 14 hours, 20 minutes of daylight.

Hours of Daylight and Twilight

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.

The earliest sunrise is at 5:32 AM on June 12, and the latest sunrise is 1 hour, 30 minutes later at 7:03 AM on November 4. The earliest sunset is at 4:35 PM on December 4, and the latest sunset is 3 hours, 20 minutes later at 7:54 PM on June 29.

Daylight saving time (DST) is observed in Brawley during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time in BrawleyJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 125:32 AMJun 125:32 AM7:54 PMJun 297:54 PMJun 29Dec 44:35 PMDec 44:35 PM7:03 AMNov 47:03 AMNov 4Mar 12DSTMar 12DSTDSTNov 5DSTNov 5daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2017. 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 transitions to and from daylight saving time are indicated by the 'DST' labels.

Humidity

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.

Brawley experiences significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.0 months, from June 26 to September 24, during which time the comfort level is muggy, oppressive, or miserable at least 10% of the time. The muggiest day of the year is August 12, with muggy conditions 39% of the time.

The least muggy day of the year is December 13, when muggy conditions are essentially unheard of.

Humidity Comfort Levels

Humidity Comfort Levels in BrawleymuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Dec 130%Dec 130%Aug 1239%Aug 1239%Jun 2610%Jun 2610%Sep 2410%Sep 2410%drydrymuggymuggyoppressiveoppressivecomfortablecomfortablemiserablemiserable
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Brawley experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 3.8 months, from March 21 to July 13, with average wind speeds of more than 8.2 miles per hour. The windiest day of the year is May 23, with an average hourly wind speed of 9.8 miles per hour.

The calmer time of year lasts for 8.2 months, from July 13 to March 21. The calmest day of the year is January 11, with an average hourly wind speed of 6.7 miles per hour.

Average Wind Speed

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

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

The wind is most often from the west for 8.5 months, from February 14 to October 31, with a peak percentage of 73% on May 22. The wind is most often from the north for 3.5 months, from October 31 to February 14, with a peak percentage of 60% on January 1.

Wind Direction

Wind Direction in BrawleyNWNJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westnorthsoutheast
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Best Time of Year to Visit

To characterize how pleasant the weather is in Brawley 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 Brawley for general outdoor tourist activities are from early April to late June and from mid September to late October, with a peak score in the second week of May.

Tourism Score

Tourism Score in Brawleybest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec02468107.57.52.82.87.57.54.74.7 precipitationprecipitationcloudscloudstemperaturetemperaturetourism 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 Brawley for hot-weather activities are from early June to late July and from mid August to late September, with a peak score in the last week of June.

Beach/Pool Score

Beach/Pool Score in Brawleybest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec02468107.57.50.50.57.27.26.66.6 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/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.

Growing Season

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).

While it does not do so every year, freezing temperatures are seen in Brawley over some winters. The day least likely to be in the growing season is January 2, with a 65% chance.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Brawleygrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%90%Feb 1290%Feb 1290%Dec 590%Dec 565%Jan 365%Jan 3Jul 16100%Jul 16100%coldwarmhotcoolvery coldswelteringcomfortable
The percentage of time spent in various temperature bands: 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 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.

Based on growing degree days alone, the first spring blooms in Brawley should appear around January 10, only rarely appearing before January 3 or after January 18.

Growing Degree Days

Growing Degree Days in BrawleyJanFebMarAprMayJunJulAugSepOctNovDec0°F1,000°F2,000°F3,000°F4,000°F5,000°F6,000°F7,000°F8,000°FJan 1089°FJan 1089°FMar 26900°FMar 26900°FMay 81,800°FMay 81,800°FDec 317,790°FDec 317,790°F
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.5 months, from April 19 to August 2, with an average daily incident shortwave energy per square meter above 7.5 kWh. The brightest day of the year is June 12, with an average of 8.6 kWh.

The darker period of the year lasts for 3.1 months, from November 5 to February 8, with an average daily incident shortwave energy per square meter below 4.3 kWh. The darkest day of the year is December 22, with an average of 3.2 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in BrawleybrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWh10 kWhJun 128.6 kWhJun 128.6 kWhDec 223.2 kWhDec 223.2 kWhApr 197.5 kWhApr 197.5 kWhAug 27.5 kWhAug 27.5 kWhNov 54.3 kWhNov 54.3 kWhFeb 84.3 kWhFeb 84.3 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Brawley are 32.979 deg latitude, -115.530 deg longitude, and -118 ft elevation.

The topography within 2 miles of Brawley is essentially flat, with a maximum elevation change of 75 feet and an average elevation above sea level of -117 feet. Within 10 miles is essentially flat (279 feet). Within 50 miles contains only modest variations in elevation (5,981 feet).

The area within 2 miles of Brawley is covered by cropland (72%), artificial surfaces (18%), and shrubs (11%), within 10 miles by cropland (91%), and within 50 miles by shrubs (55%) and bare soil (20%).

Data Sources

This report illustrates the typical weather in Brawley, 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 are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Brawley.

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

The estimated value at Brawley is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Brawley and a given station.

The stations contributing to this reconstruction are: Imperial County Airport (88%, 17 kilometers, south); Thermal Airport (7%, 93 kilometers, northwest); and Blythe Airport (6%, 104 kilometers, northeast).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , 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 aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

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.