Climate averages 1991–2020
Round Rock weather
in January.
A mild, moderately wet month: the coolest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a mild month in Round Rock: daytime highs average 15.6°C and nights cool to about 5.8°C. By daytime temperature it is the coolest month of the year.
Expect about 59 mm of rain on roughly 7 days, which makes January a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 25 min on an average January day.
The nearest other city in this atlas is Austin (28 km away). In January its highs average 15.9°C, about as warm as Round Rock, with 61 mm of rain.
Among the 498 cities listed in the United States, Round Rock ranks 128th of 498 for the warmest January highs and joint 159th of 498 for the driest January (rainfall, lowest first). The mean January high of those 498 cities is 9.5°C; Round Rock is 6.1°C warmer than that mean.
From January to February, average highs rise by 2.2°C to 17.8°C, and monthly rainfall rises from 59 mm to 61 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
Round Rock climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 15.6°C5.8°C | 5.8°C | 59 | 6.8 | 10.410 h |
| February | 17.8°C7.6°C | 7.6°C | 61 | 7.4 | 11.111 h |
| March | 21.4°C11.0°C | 11.0°C | 74 | 8.8 | 12.012 h |
| April | 25.5°C14.9°C | 14.9°C | 76 | 8.2 | 12.913 h |
| May | 28.9°C19.3°C | 19.3°C | 110 | 10.8 | 13.714 h |
| June | 32.4°C22.7°C | 22.7°C | 72 | 8.7 | 14.114 h |
| July | 34.5°C24.2°C | 24.2°C | 39 | 5.7 | 13.914 h |
| August | 34.7°C24.6°C | 24.6°C | 54 | 5.8 | 13.313 h |
| September | 31.1°C21.5°C | 21.5°C | 74 | 7.4 | 12.412 h |
| October | 26.4°C16.4°C | 16.4°C | 86 | 7.1 | 11.511 h |
| November | 20.3°C10.8°C | 10.8°C | 69 | 6.6 | 10.611 h |
| December | 16.3°C6.8°C | 6.8°C | 70 | 7.5 | 10.210 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
- Austin in JanuaryUnited States · 28 kmHigh 15.9°C · Low 5.9°C · 61 mm rain
- Killeen in JanuaryUnited States · 68 kmHigh 14.9°C · Low 4.9°C · 59 mm rain
- Temple in JanuaryUnited States · 73 kmHigh 14.8°C · Low 5.0°C · 72 mm rain
- New Braunfels in JanuaryUnited States · 99 kmHigh 16.4°C · Low 6.6°C · 63 mm rain
- Waco in JanuaryUnited States · 126 kmHigh 14.7°C · Low 4.9°C · 70 mm rain
- Bryan in JanuaryUnited States · 127 kmHigh 15.4°C · Low 5.7°C · 87 mm rain
- College Station in JanuaryUnited States · 129 kmHigh 15.5°C · Low 5.9°C · 87 mm rain
- San Antonio in JanuaryUnited States · 144 kmHigh 16.9°C · Low 6.7°C · 57 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 Round Rock) is explained once on the Round Rock year overview and on the Sources, method and limits page.