Climate averages 1991–2020
Mission weather
in August.
A very hot, fairly dry month: the warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a very hot month in Mission: daytime highs average 36.1°C and nights cool to about 25.7°C. By daytime temperature it is the warmest month of the year.
Expect about 39 mm of rain on roughly 7 days, which makes August a fairly dry month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 04 min on an average August day.
The nearest other city in this atlas is McAllen (10 km away). In August its highs average 35.9°C, about as warm as Mission, with 39 mm of rain.
Among the 498 cities listed in the United States, Mission ranks 20th of 498 for the warmest August highs and joint 168th of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Mission is 6.2°C warmer than that mean.
From August to September, average highs fall by 3.4°C to 32.7°C, and monthly rainfall rises from 39 mm to 88 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Mission climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 21.9°C12.0°C | 12.0°C | 26 | 4.4 | 10.711 h |
| February | 24.5°C14.0°C | 14.0°C | 24 | 4.4 | 11.311 h |
| March | 27.5°C16.8°C | 16.8°C | 36 | 5.2 | 12.012 h |
| April | 30.7°C19.9°C | 19.9°C | 44 | 5.3 | 12.813 h |
| May | 33.2°C23.0°C | 23.0°C | 55 | 6.6 | 13.413 h |
| June | 35.2°C25.1°C | 25.1°C | 51 | 7.0 | 13.814 h |
| July | 35.8°C25.5°C | 25.5°C | 55 | 5.7 | 13.614 h |
| August, selected | 36.1°C25.7°C | 25.7°C | 39 | 6.7 | 13.113 h |
| September | 32.7°C23.8°C | 23.8°C | 88 | 11.8 | 12.312 h |
| October | 30.2°C20.5°C | 20.5°C | 59 | 6.7 | 11.612 h |
| November | 25.7°C16.1°C | 16.1°C | 35 | 5.3 | 10.911 h |
| December | 22.5°C12.9°C | 12.9°C | 30 | 5.1 | 10.511 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- McAllen in AugustUnited States · 10 kmHigh 35.9°C · Low 25.7°C · 39 mm rain
- Reynosa in AugustMexico · 16 kmHigh 36.1°C · Low 25.8°C · 39 mm rain
- Edinburg in AugustUnited States · 19 kmHigh 36.0°C · Low 25.8°C · 39 mm rain
- Ciudad Río Bravo in AugustMexico · 35 kmHigh 35.5°C · Low 25.7°C · 44 mm rain
- Heroica Matamoros in AugustMexico · 90 kmHigh 32.7°C · Low 26.1°C · 52 mm rain
- Nuevo Laredo in AugustMexico · 183 kmHigh 37.3°C · Low 26.1°C · 35 mm rain
- Ciudad Benito Juárez in AugustMexico · 188 kmHigh 33.1°C · Low 22.4°C · 48 mm rain
- Ciudad Apodaca in AugustMexico · 192 kmHigh 33.6°C · Low 22.7°C · 31 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Mission) is explained once on the Mission year overview and on the Sources, method and limits page.
McAllen and Edinburg lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.