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Mission, Texas climate
BSh Hot semi-arid
Mission has a seasonal tropical climate (Hot semi-arid, Köppen BSh). The hottest month is August with an average daily high near 37°C, while the coldest is January averaging around 10°C at night. Precipitation totals about 474 mm a year and is strongly seasonal — September alone averages 97 mm while December barely receives 14 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsMission climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 25 | 28 | 30 | 33 | 36 | 36 | 37 | 34 | 32 | 26 | 23 |
| Avg temp (°C) | 16 | 18 | 21 | 25 | 28 | 30 | 31 | 31 | 29 | 25 | 20 | 17 |
| Avg low (°C) | 10 | 12 | 15 | 19 | 22 | 24 | 25 | 25 | 23 | 19 | 14 | 10 |
| Precipitation (mm) | 17 | 16 | 26 | 35 | 35 | 77 | 41 | 37 | 97 | 52 | 27 | 14 |
| Snowfall (cm) | — | — | — | — | — | — | — | — | — | — | — | 0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 25 | 28 | 30 | 33 | 36 |
| Avg temp (°C) | 16 | 18 | 21 | 25 | 28 | 30 |
| Avg low (°C) | 10 | 12 | 15 | 19 | 22 | 24 |
| Precipitation (mm) | 17 | 16 | 26 | 35 | 35 | 77 |
| Snowfall (cm) | — | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 36 | 37 | 34 | 32 | 26 | 23 |
| Avg temp (°C) | 31 | 31 | 29 | 25 | 20 | 17 |
| Avg low (°C) | 25 | 25 | 23 | 19 | 14 | 10 |
| Precipitation (mm) | 41 | 37 | 97 | 52 | 27 | 14 |
| Snowfall (cm) | — | — | — | — | — | 0 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 6 | 3 | 2 | 3 |
| Days with high ≥ 32°C (days) | 0.2 | 2 | 4 | 9 | 19 | 25 | 25 | 26 | 23 | 11 | 2 | 0.3 |
| Days with low ≤ 0°C (days) | 0.5 | 0.5 | — | — | — | — | — | — | — | — | — | 0.3 |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | — | — | — | — | — | — | — | — | 0.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 3 | 3 | 3 | 3 | 3 | 3 |
| Days with high ≥ 32°C (days) | 0.2 | 2 | 4 | 9 | 19 | 25 |
| Days with low ≤ 0°C (days) | 0.5 | 0.5 | — | — | — | — |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 3 | 3 | 6 | 3 | 2 | 3 |
| Days with high ≥ 32°C (days) | 25 | 26 | 23 | 11 | 2 | 0.3 |
| Days with low ≤ 0°C (days) | — | — | — | — | — | 0.3 |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | — | — | 0.0 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 59 | 59 | 60 | 58 | 52 | 42 | 38 | 38 | 46 | 41 | 50 | 59 |
| Clear days (≤ 30% cloud) | 8 | 7 | 7 | 7 | 8 | 13 | 15 | 15 | 12 | 14 | 10 | 7 |
| Partly cloudy days (30–70%) | 9 | 8 | 10 | 11 | 12 | 11 | 10 | 11 | 10 | 10 | 10 | 10 |
| Cloudy days (≥ 70%) | 14 | 13 | 14 | 12 | 11 | 6 | 6 | 5 | 8 | 7 | 10 | 14 |
| Relative humidity (%) | 71 | 69 | 66 | 65 | 66 | 66 | 67 | 66 | 72 | 71 | 71 | 71 |
| Wind speed (mph) | 7.3 | 8.1 | 8.7 | 9.0 | 9.0 | 8.5 | 8.7 | 7.5 | 6.0 | 6.6 | 6.9 | 7.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 59 | 59 | 60 | 58 | 52 | 42 |
| Clear days (≤ 30% cloud) | 8 | 7 | 7 | 7 | 8 | 13 |
| Partly cloudy days (30–70%) | 9 | 8 | 10 | 11 | 12 | 11 |
| Cloudy days (≥ 70%) | 14 | 13 | 14 | 12 | 11 | 6 |
| Relative humidity (%) | 71 | 69 | 66 | 65 | 66 | 66 |
| Wind speed (mph) | 7.3 | 8.1 | 8.7 | 9.0 | 9.0 | 8.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 38 | 38 | 46 | 41 | 50 | 59 |
| Clear days (≤ 30% cloud) | 15 | 15 | 12 | 14 | 10 | 7 |
| Partly cloudy days (30–70%) | 10 | 11 | 10 | 10 | 10 | 10 |
| Cloudy days (≥ 70%) | 6 | 5 | 8 | 7 | 10 | 14 |
| Relative humidity (%) | 67 | 66 | 72 | 71 | 71 | 71 |
| Wind speed (mph) | 8.7 | 7.5 | 6.0 | 6.6 | 6.9 | 7.0 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Mcallen (NOAA GHCN station USC00415701), about 8 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.