Climate averages 1991–2020
Dallas weather
in January.
A cool, moderately wet month: the coolest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cool month in Dallas: daytime highs average 13.2°C and nights cool to about 3.8°C. By daytime temperature it is the coolest month of the year.
Expect about 71 mm of rain on roughly 7 days, which makes January a moderately wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 15 min on an average January day.
The nearest other city in this atlas is Irving (14 km away). In January its highs average 13.2°C, about as warm as Dallas, with 68 mm of rain.
Among the 498 cities listed in the United States, Dallas ranks joint 202nd of 498 for the warmest January highs and joint 233rd of 498 for the driest January (rainfall, lowest first). The mean January high of those 498 cities is 9.5°C; Dallas is 3.8°C warmer than that mean.
From January to February, average highs rise by 2.4°C to 15.6°C, and monthly rainfall rises from 71 mm to 76 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
Dallas climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 13.2°C3.8°C | 3.8°C | 71 | 7.1 | 10.310 h |
| February | 15.6°C5.7°C | 5.7°C | 76 | 7.7 | 11.011 h |
| March | 19.7°C9.6°C | 9.6°C | 100 | 9.5 | 12.012 h |
| April | 24.0°C13.9°C | 13.9°C | 107 | 8.8 | 13.013 h |
| May | 27.9°C18.7°C | 18.7°C | 127 | 10.6 | 13.814 h |
| June | 31.9°C23.0°C | 23.0°C | 83 | 8.4 | 14.314 h |
| July | 34.5°C25.3°C | 25.3°C | 41 | 5.7 | 14.114 h |
| August | 34.5°C25.4°C | 25.4°C | 53 | 5.4 | 13.413 h |
| September | 30.7°C21.5°C | 21.5°C | 63 | 5.9 | 12.412 h |
| October | 25.2°C15.6°C | 15.6°C | 97 | 7.7 | 11.411 h |
| November | 18.8°C9.6°C | 9.6°C | 88 | 7.2 | 10.511 h |
| December | 14.1°C5.0°C | 5.0°C | 89 | 6.9 | 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
January in nearby cities
- Irving in JanuaryUnited States · 14 kmHigh 13.2°C · Low 3.7°C · 68 mm rain
- Grand Prairie in JanuaryUnited States · 18 kmHigh 13.4°C · Low 3.8°C · 68 mm rain
- Mesquite in JanuaryUnited States · 19 kmHigh 13.0°C · Low 3.6°C · 74 mm rain
- Richardson in JanuaryUnited States · 20 kmHigh 12.7°C · Low 3.4°C · 70 mm rain
- Carrollton in JanuaryUnited States · 21 kmHigh 12.8°C · Low 3.5°C · 68 mm rain
- Garland in JanuaryUnited States · 21 kmHigh 12.7°C · Low 3.4°C · 70 mm rain
- Plano in JanuaryUnited States · 28 kmHigh 12.5°C · Low 3.3°C · 70 mm rain
- Arlington (Texas), United States in JanuaryUnited States · 29 kmHigh 13.2°C · Low 3.6°C · 68 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 Dallas) is explained once on the Dallas year overview and on the Sources, method and limits page.