Climate averages 1991–2020

Rock Hill weather
in January.

A cool, wet month: the coolest and the 8th driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 10.5°C Daytime mean, January

Average low 1.5°C Night-time mean, January

Rainfall 95 mm 10 days with ≥1 mm

Daylight 10 h Sunrise to sunset, per day

January is a cool month in Rock Hill: daytime highs average 10.5°C and nights cool to about 1.5°C. By daytime temperature it is the coolest month of the year.

Expect about 95 mm of rain on roughly 10 days, which makes January a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 06 min on an average January day.

The nearest other city in this atlas is Charlotte (37 km away). In January its highs average 9.8°C, 0.8°C cooler than Rock Hill, with 91 mm of rain.

Among the 498 cities listed in the United States, Rock Hill ranks 237th of 498 for the warmest January highs and joint 405th of 498 for the driest January (rainfall, lowest first). The mean January high of those 498 cities is 9.5°C; Rock Hill is 1.1°C warmer than that mean.

From January to February, average highs rise by 2.1°C to 12.6°C, and monthly rainfall falls from 95 mm to 87 mm.

The annual picture

January in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Rock Hill climate table

1991–2020

Monthly climate averages for Rock Hill, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January, selected	10.5°C1.5°C	1.5°C	95	9.5	10.110 h
February	12.6°C2.9°C	2.9°C	87	8.8	10.911 h
March	16.7°C6.2°C	6.2°C	107	9.9	11.912 h
April	21.8°C10.8°C	10.8°C	89	8.7	13.013 h
May	26.2°C15.7°C	15.7°C	73	9.6	14.014 h
June	29.8°C20.1°C	20.1°C	96	11.8	14.514 h
July	31.6°C22.1°C	22.1°C	93	13.5	14.314 h
August	30.4°C21.4°C	21.4°C	102	11.5	13.513 h
September	27.4°C18.4°C	18.4°C	93	8.4	12.412 h
October	22.0°C12.4°C	12.4°C	83	6.9	11.311 h
November	16.2°C6.7°C	6.7°C	80	7.5	10.410 h
December	11.9°C3.1°C	3.1°C	96	9.1	9.910 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

Distance from Rock Hill

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 limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Rock Hill) is explained once on the Rock Hill year overview and on the Sources, method and limits page.