Climate averages 1991–2020

Huntsville weather
in May.

A warm, wet month: the 5th warmest and the joint 5th driest of the year.

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

Average high 25.8°C Daytime mean, May

Average low 15.7°C Night-time mean, May

Rainfall 106 mm 11 days with ≥1 mm

Daylight 14 h Sunrise to sunset, per day

May is a warm month in Huntsville: daytime highs average 25.8°C and nights cool to about 15.7°C. By daytime temperature it is the 5th warmest of the 12 months.

Expect about 106 mm of rain on roughly 11 days, which makes May a wet month (the joint 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 58 min on an average May day.

The nearest other city in this atlas is Chattanooga (122 km away). In May its highs average 25.4°C, about as warm as Huntsville, with 101 mm of rain.

Among the 498 cities listed in the United States, Huntsville ranks joint 167th of 498 for the warmest May highs and joint 391st of 498 for the driest May (rainfall, lowest first). The mean May high of those 498 cities is 23.8°C; Huntsville is 2.0°C warmer than that mean.

From May to June, average highs rise by 3.8°C to 29.6°C, and monthly rainfall falls from 106 mm to 105 mm.

The annual picture

May 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

Huntsville climate table

1991–2020

Monthly climate averages for Huntsville, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	9.7°C1.1°C	1.1°C	129	10.3	10.110 h
February	12.1°C2.6°C	2.6°C	124	11.1	10.911 h
March	16.5°C6.2°C	6.2°C	145	11.8	11.912 h
April	21.3°C10.7°C	10.7°C	126	10.4	13.013 h
May, selected	25.8°C15.7°C	15.7°C	106	11.0	14.014 h
June	29.6°C20.1°C	20.1°C	105	12.4	14.414 h
July	31.0°C22.0°C	22.0°C	112	12.8	14.214 h
August	31.0°C21.7°C	21.7°C	78	11.1	13.513 h
September	28.1°C18.6°C	18.6°C	92	7.5	12.412 h
October	22.3°C12.5°C	12.5°C	86	7.2	11.311 h
November	15.7°C6.4°C	6.4°C	106	8.9	10.410 h
December	11.1°C2.8°C	2.8°C	139	11.2	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

May in nearby cities

Distance from Huntsville

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 Huntsville) is explained once on the Huntsville year overview and on the Sources, method and limits page.