Climate averages 1991–2020
Columbia (Maryland), United States weather
in October.
A mild, wet month: the 6th warmest and the 5th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
October is a mild month in Columbia (Maryland), United States: daytime highs average 18.3°C and nights cool to about 10.3°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 91 mm of rain on roughly 8 days, which makes October a wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 12 min on an average October day.
The nearest other city in this atlas is Baltimore (20 km away). In October its highs average 18.6°C, about as warm as Columbia (Maryland), United States, with 102 mm of rain.
Among the 498 cities listed in the United States, Columbia (Maryland), United States ranks joint 316th of 498 for the warmest October highs and joint 346th of 498 for the driest October (rainfall, lowest first). The mean October high of those 498 cities is 21.4°C; Columbia (Maryland), United States is 3.0°C cooler than that mean.
From October to November, average highs fall by 6.2°C to 12.1°C, and monthly rainfall falls from 91 mm to 76 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
Columbia (Maryland), United States climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.6°C-2.7°C | -2.7°C | 80 | 8.5 | 9.710 h |
| February | 6.3°C-2.1°C | -2.1°C | 74 | 8.5 | 10.711 h |
| March | 10.8°C1.6°C | 1.6°C | 102 | 10.3 | 11.912 h |
| April | 17.1°C7.3°C | 7.3°C | 90 | 10.2 | 13.213 h |
| May | 22.1°C12.9°C | 12.9°C | 97 | 11.3 | 14.314 h |
| June | 26.9°C18.1°C | 18.1°C | 95 | 11.6 | 14.915 h |
| July | 29.5°C20.9°C | 20.9°C | 108 | 12.1 | 14.615 h |
| August | 28.4°C20.2°C | 20.2°C | 95 | 10.8 | 13.714 h |
| September | 24.6°C16.6°C | 16.6°C | 116 | 9.1 | 12.512 h |
| October, selected | 18.3°C10.3°C | 10.3°C | 91 | 8.0 | 11.211 h |
| November | 12.1°C4.5°C | 4.5°C | 76 | 7.6 | 10.110 h |
| December | 6.9°C-0.1°C | -0.1°C | 94 | 9.0 | 9.59 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
- Baltimore in OctoberUnited States · 20 kmHigh 18.6°C · Low 10.2°C · 102 mm rain
- Silver Spring in OctoberUnited States · 32 kmHigh 18.9°C · Low 10.1°C · 86 mm rain
- Germantown in OctoberUnited States · 38 kmHigh 18.6°C · Low 9.7°C · 87 mm rain
- Washington in OctoberUnited States · 42 kmHigh 19.7°C · Low 10.4°C · 86 mm rain
- Arlington (Virginia), United States in OctoberUnited States · 46 kmHigh 19.1°C · Low 10.1°C · 86 mm rain
- Alexandria, United States in OctoberUnited States · 52 kmHigh 19.5°C · Low 10.8°C · 85 mm rain
- Centreville in OctoberUnited States · 68 kmHigh 19.0°C · Low 10.5°C · 85 mm rain
- Wilmington (Delaware), United States in OctoberUnited States · 124 kmHigh 18.2°C · Low 10.0°C · 91 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 Columbia) is explained once on the Columbia (Maryland), United States year overview and on the Sources, method and limits page.