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Louisville, Kentucky climate

Cfa Humid subtropical

Louisville has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 32°C, while the coldest is January averaging around −3°C at night. Precipitation is fairly even year-round, totalling about 1219 mm. Snow is occasional (11 cm of snow per year on average).

☀️ Summers

Hot

Highs near 32°C in July.

About 15 days a year above 32 °C

❄️ Winters

Cold

Lows near −3°C in January.

About 25 freezing nights a year

🌧️ Rain & snow

Wet

About 1219 mm of rain a year, plus 11 cm of snow.

Snow falls through the winter months

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

+1.5 °C 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

Louisville climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	6	9	14	21	25	30	32	31	28	21	14	8
Avg temp (°C)	1	4	8	15	20	24	26	26	22	16	9	4
Avg low (°C)	−3	−2	3	8	15	19	21	20	16	10	3	−1
Precipitation (mm)	88	89	115	122	122	113	90	83	100	89	95	114
Snowfall (cm)	6	1	1	—	—	—	—	—	—	—	—	4

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	6	9	14	21	25	30
Avg temp (°C)	1	4	8	15	20	24
Avg low (°C)	−3	−2	3	8	15	19
Precipitation (mm)	88	89	115	122	122	113
Snowfall (cm)	6	1	1	—	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	32	31	28	21	14	8
Avg temp (°C)	26	26	22	16	9	4
Avg low (°C)	21	20	16	10	3	−1
Precipitation (mm)	90	83	100	89	95	114
Snowfall (cm)	—	—	—	—	—	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 ≥ 32°C (days)	—	—	—	0.0	0.6	3	5	3	2	0.2	—	—
Days with low ≤ 0°C (days)	7	6	3	0.4	0.1	—	—	—	—	0.1	3	5
Days with snowfall ≥ 2.5 cm (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 ≥ 32°C (days)	—	—	—	0.0	0.6	3
Days with low ≤ 0°C (days)	7	6	3	0.4	0.1	—
Days with snowfall ≥ 2.5 cm (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 ≥ 32°C (days)	5	3	2	0.2	—	—
Days with low ≤ 0°C (days)	—	—	—	0.1	3	5
Days with snowfall ≥ 2.5 cm (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 (km/h)	9.0	9.0	8.8	8.4	6.7	5.5	4.9	4.8	5.5	6.4	7.2	7.6

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 (km/h)	9.0	9.0	8.8	8.4	6.7	5.5

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 (km/h)	4.9	4.8	5.5	6.4	7.2	7.6

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 4 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 →