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Clarksville, Indiana climate

Cfa Humid subtropical

Clarksville has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 89°F, while the coldest is January averaging around 26°F at night. Precipitation is fairly even year-round, totalling about 48 inches. Snow is occasional (4 inches of snow per year on average).

☀️ Summers

Hot

Highs near 89°F in July.

About 15 days a year above 90 °F

❄️ Winters

Cold

Lows near 26°F in January.

About 25 freezing nights a year

🌧️ Rain & snow

Wet

About 48 in of rain a year, plus 4 in of snow.

Snow falls through the winter months

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

+2.6 °F vs 50 years ago

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Clear vs cloudy days

Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day counts

Clarksville climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	43	48	57	69	77	85	89	88	82	70	57	47
Avg temp (°F)	35	38	47	58	68	76	79	78	72	60	47	39
Avg low (°F)	26	29	37	47	58	66	70	69	62	50	38	31
Precipitation (in)	3.5	3.5	4.5	4.8	4.8	4.4	3.5	3.3	3.9	3.5	3.8	4.5
Snowfall (in)	2.3	0.3	0.3	—	—	—	—	—	—	—	—	1.4

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	43	48	57	69	77	85
Avg temp (°F)	35	38	47	58	68	76
Avg low (°F)	26	29	37	47	58	66
Precipitation (in)	3.5	3.5	4.5	4.8	4.8	4.4
Snowfall (in)	2.3	0.3	0.3	—	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	89	88	82	70	57	47
Avg temp (°F)	79	78	72	60	47	39
Avg low (°F)	70	69	62	50	38	31
Precipitation (in)	3.5	3.3	3.9	3.5	3.8	4.5
Snowfall (in)	—	—	—	—	—	1.4

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	11	10	11	11	11	10	10	8	8	8	10	11
Days with high ≥ 90°F (days)	—	—	—	0.0	0.6	3	5	3	2	0.2	—	—
Days with low ≤ 32°F (days)	7	6	3	0.4	0.1	—	—	—	—	0.1	3	5
Days with snowfall ≥ 1 in (days)	0.5	0.1	0.1	—	—	—	—	—	—	—	—	0.3

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	11	10	11	11	11	10
Days with high ≥ 90°F (days)	—	—	—	0.0	0.6	3
Days with low ≤ 32°F (days)	7	6	3	0.4	0.1	—
Days with snowfall ≥ 1 in (days)	0.5	0.1	0.1	—	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	10	8	8	8	10	11
Days with high ≥ 90°F (days)	5	3	2	0.2	—	—
Days with low ≤ 32°F (days)	—	—	—	0.1	3	5
Days with snowfall ≥ 1 in (days)	—	—	—	—	—	0.3

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	72	72	68	64	65	57	54	50	48	55	62	71
Clear days (≤ 30% cloud)	3	3	5	6	5	7	8	10	11	9	7	4
Partly cloudy days (30–70%)	9	9	9	9	10	12	13	11	10	9	9	9
Cloudy days (≥ 70%)	19	17	17	15	16	11	11	10	9	13	15	19
Relative humidity (%)	86	85	82	79	80	79	77	71	68	72	79	86
Wind speed (mph)	5.6	5.6	5.5	5.2	4.1	3.4	3.0	3.0	3.4	4.0	4.5	4.7

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	72	72	68	64	65	57
Clear days (≤ 30% cloud)	3	3	5	6	5	7
Partly cloudy days (30–70%)	9	9	9	9	10	12
Cloudy days (≥ 70%)	19	17	17	15	16	11
Relative humidity (%)	86	85	82	79	80	79
Wind speed (mph)	5.6	5.6	5.5	5.2	4.1	3.4

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	54	50	48	55	62	71
Clear days (≤ 30% cloud)	8	10	11	9	7	4
Partly cloudy days (30–70%)	13	11	10	9	9	9
Cloudy days (≥ 70%)	11	10	9	13	15	19
Relative humidity (%)	77	71	68	72	79	86
Wind speed (mph)	3.0	3.0	3.4	4.0	4.5	4.7

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Louisville Mcalpine (NOAA GHCN station USC00154955), about 3 km from the city centre.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →