Climate averages 1991–2020
Dayton weather
in January.
A cold, moderately wet month: the coolest and the joint 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cold month in Dayton: daytime highs average 2.3°C and nights cool to about -5.5°C. By daytime temperature it is the coolest month of the year.
Expect about 82 mm of rain on roughly 10 days, which makes January a moderately wet month (the joint 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 42 min on an average January day.
The nearest other city in this atlas is Cincinnati (76 km away). In January its highs average 3.5°C, 1.2°C warmer than Dayton, with 83 mm of rain.
Among the 498 cities listed in the United States, Dayton ranks 385th of 498 for the warmest January highs and joint 290th of 498 for the driest January (rainfall, lowest first). The mean January high of those 498 cities is 9.5°C; Dayton is 7.1°C cooler than that mean.
From January to February, average highs rise by 2.3°C to 4.6°C, and monthly rainfall falls from 82 mm to 70 mm.
The annual picture
January 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
Dayton climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 2.3°C-5.5°C | -5.5°C | 82 | 9.8 | 9.710 h |
| February | 4.6°C-4.1°C | -4.1°C | 70 | 9.3 | 10.711 h |
| March | 10.0°C0.4°C | 0.4°C | 100 | 11.1 | 11.912 h |
| April | 16.8°C6.4°C | 6.4°C | 116 | 12.7 | 13.213 h |
| May | 22.0°C12.3°C | 12.3°C | 116 | 13.3 | 14.314 h |
| June | 26.5°C17.4°C | 17.4°C | 106 | 12.6 | 14.915 h |
| July | 28.4°C19.5°C | 19.5°C | 86 | 11.6 | 14.715 h |
| August | 27.9°C18.9°C | 18.9°C | 81 | 10.0 | 13.714 h |
| September | 24.4°C15.3°C | 15.3°C | 68 | 7.8 | 12.512 h |
| October | 17.6°C9.0°C | 9.0°C | 74 | 8.4 | 11.211 h |
| November | 10.4°C2.8°C | 2.8°C | 82 | 8.9 | 10.010 h |
| December | 4.6°C-2.3°C | -2.3°C | 85 | 9.7 | 9.49 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
January in nearby cities
- Cincinnati in JanuaryUnited States · 76 kmHigh 3.5°C · Low -4.8°C · 83 mm rain
- Columbus in JanuaryUnited States · 104 kmHigh 2.2°C · Low -6.1°C · 84 mm rain
- Muncie in JanuaryUnited States · 113 kmHigh 1.2°C · Low -6.9°C · 77 mm precipitation
- Fishers in JanuaryUnited States · 157 kmHigh 1.7°C · Low -6.4°C · 79 mm precipitation
- Carmel in JanuaryUnited States · 166 kmHigh 1.6°C · Low -6.4°C · 79 mm precipitation
- Indianapolis in JanuaryUnited States · 168 kmHigh 1.9°C · Low -6.0°C · 80 mm precipitation
- Fort Wayne in JanuaryUnited States · 172 kmHigh 0.3°C · Low -7.4°C · 69 mm precipitation
- Meads in JanuaryUnited States · 197 kmHigh 5.8°C · Low -2.5°C · 90 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 Dayton) is explained once on the Dayton year overview and on the Sources, method and limits page.