Climate averages 1991–2020
Allen weather
in October.
A warm, wet month: the 6th warmest and the 9th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
October is a warm month in Allen: daytime highs average 24.5°C and nights cool to about 15.1°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 99 mm of rain on roughly 8 days, which makes October a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 23 min on an average October day.
The nearest other city in this atlas is Plano (10 km away). In October its highs average 24.6°C, about as warm as Allen, with 99 mm of rain.
Among the 498 cities listed in the United States, Allen ranks joint 179th of 498 for the warmest October highs and joint 399th of 498 for the driest October (rainfall, lowest first). The mean October high of those 498 cities is 21.4°C; Allen is 3.1°C warmer than that mean.
From October to November, average highs fall by 6.5°C to 18.0°C, and monthly rainfall falls from 99 mm to 93 mm.
The annual picture
October 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
Allen climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 12.5°C3.2°C | 3.2°C | 70 | 6.8 | 10.210 h |
| February | 14.8°C5.2°C | 5.2°C | 73 | 7.5 | 11.011 h |
| March | 19.0°C9.1°C | 9.1°C | 100 | 9.2 | 12.012 h |
| April | 23.3°C13.3°C | 13.3°C | 110 | 8.4 | 13.013 h |
| May | 27.2°C18.2°C | 18.2°C | 138 | 11.1 | 13.814 h |
| June | 31.3°C22.6°C | 22.6°C | 86 | 8.4 | 14.314 h |
| July | 33.8°C24.9°C | 24.9°C | 46 | 5.9 | 14.114 h |
| August | 33.9°C24.9°C | 24.9°C | 53 | 5.3 | 13.413 h |
| September | 30.0°C21.0°C | 21.0°C | 71 | 6.2 | 12.412 h |
| October, selected | 24.5°C15.1°C | 15.1°C | 99 | 7.8 | 11.411 h |
| November | 18.0°C9.1°C | 9.1°C | 93 | 7.0 | 10.510 h |
| December | 13.3°C4.5°C | 4.5°C | 91 | 7.1 | 10.010 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
October in nearby cities
- Plano in OctoberUnited States · 10 kmHigh 24.6°C · Low 15.1°C · 99 mm rain
- McKinney in OctoberUnited States · 12 kmHigh 24.4°C · Low 14.9°C · 104 mm rain
- Frisco in OctoberUnited States · 15 kmHigh 24.4°C · Low 14.9°C · 100 mm rain
- Richardson in OctoberUnited States · 18 kmHigh 24.7°C · Low 15.2°C · 99 mm rain
- Garland in OctoberUnited States · 21 kmHigh 24.8°C · Low 15.2°C · 99 mm rain
- Carrollton in OctoberUnited States · 26 kmHigh 24.9°C · Low 15.5°C · 96 mm rain
- Lewisville in OctoberUnited States · 31 kmHigh 24.9°C · Low 15.5°C · 96 mm rain
- Dallas in OctoberUnited States · 38 kmHigh 25.2°C · Low 15.6°C · 97 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 Allen) is explained once on the Allen year overview and on the Sources, method and limits page.
Plano, Garland and Richardson lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.