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Allen, Texas climate
Cfa Humid subtropical
Allen has a seasonal warm-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 35°C, while the coldest is January averaging around 2°C at night. Around 1065 mm of precipitation falls each year, peaking in October (134 mm) and easing off in July (56 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 countsAllen climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 13 | 16 | 20 | 24 | 28 | 32 | 35 | 35 | 31 | 25 | 19 | 14 |
| Avg temp (°C) | 8 | 10 | 15 | 18 | 23 | 27 | 29 | 29 | 25 | 19 | 13 | 9 |
| Avg low (°C) | 2 | 4 | 9 | 13 | 18 | 22 | 24 | 24 | 20 | 13 | 8 | 3 |
| Precipitation (mm) | 71 | 86 | 90 | 89 | 132 | 97 | 56 | 63 | 84 | 134 | 77 | 86 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 13 | 16 | 20 | 24 | 28 | 32 |
| Avg temp (°C) | 8 | 10 | 15 | 18 | 23 | 27 |
| Avg low (°C) | 2 | 4 | 9 | 13 | 18 | 22 |
| Precipitation (mm) | 71 | 86 | 90 | 89 | 132 | 97 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 35 | 35 | 31 | 25 | 19 | 14 |
| Avg temp (°C) | 29 | 29 | 25 | 19 | 13 | 9 |
| Avg low (°C) | 24 | 24 | 20 | 13 | 8 | 3 |
| Precipitation (mm) | 56 | 63 | 84 | 134 | 77 | 86 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 8 | 8 | 9 | 8 | 9 | 7 | 5 | 5 | 6 | 8 | 7 | 8 |
| Days with high ≥ 32°C (days) | — | — | — | 0.2 | 2 | 10 | 13 | 13 | 7 | 1 | 0.1 | — |
| Days with low ≤ 0°C (days) | 5 | 4 | 1 | 0.0 | — | — | — | — | — | 0.0 | 1 | 5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 8 | 8 | 9 | 8 | 9 | 7 |
| Days with high ≥ 32°C (days) | — | — | — | 0.2 | 2 | 10 |
| Days with low ≤ 0°C (days) | 5 | 4 | 1 | 0.0 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 5 | 5 | 6 | 8 | 7 | 8 |
| Days with high ≥ 32°C (days) | 13 | 13 | 7 | 1 | 0.1 | — |
| Days with low ≤ 0°C (days) | — | — | — | 0.0 | 1 | 5 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 55 | 59 | 58 | 54 | 57 | 47 | 41 | 41 | 41 | 43 | 50 | 56 |
| Clear days (≤ 30% cloud) | 10 | 7 | 8 | 9 | 8 | 10 | 13 | 14 | 13 | 14 | 10 | 9 |
| Partly cloudy days (30–70%) | 9 | 8 | 9 | 10 | 10 | 12 | 12 | 11 | 10 | 9 | 10 | 9 |
| Cloudy days (≥ 70%) | 13 | 13 | 14 | 12 | 13 | 8 | 6 | 6 | 7 | 9 | 10 | 13 |
| Relative humidity (%) | 75 | 75 | 74 | 72 | 73 | 69 | 60 | 57 | 63 | 66 | 72 | 75 |
| Wind speed (mph) | 7.2 | 7.6 | 7.9 | 8.0 | 7.2 | 6.5 | 6.2 | 5.6 | 5.7 | 6.6 | 7.0 | 6.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 55 | 59 | 58 | 54 | 57 | 47 |
| Clear days (≤ 30% cloud) | 10 | 7 | 8 | 9 | 8 | 10 |
| Partly cloudy days (30–70%) | 9 | 8 | 9 | 10 | 10 | 12 |
| Cloudy days (≥ 70%) | 13 | 13 | 14 | 12 | 13 | 8 |
| Relative humidity (%) | 75 | 75 | 74 | 72 | 73 | 69 |
| Wind speed (mph) | 7.2 | 7.6 | 7.9 | 8.0 | 7.2 | 6.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 41 | 41 | 41 | 43 | 50 | 56 |
| Clear days (≤ 30% cloud) | 13 | 14 | 13 | 14 | 10 | 9 |
| Partly cloudy days (30–70%) | 12 | 11 | 10 | 9 | 10 | 9 |
| Cloudy days (≥ 70%) | 6 | 6 | 7 | 9 | 10 | 13 |
| Relative humidity (%) | 60 | 57 | 63 | 66 | 72 | 75 |
| Wind speed (mph) | 6.2 | 5.6 | 5.7 | 6.6 | 7.0 | 6.9 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Richardson (NOAA GHCN station USC00417588), about 14 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.