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Hanford, California climate

BSk Cold semi-arid

Hanford has a seasonal mild-temperate climate (Cold semi-arid, Köppen BSk). The hottest month is July with an average daily high near 37°C, while the coldest is December averaging around 2°C at night. Precipitation totals about 216 mm a year and is strongly seasonal — January alone averages 45 mm while August barely receives 0 mm.

☀️ Summers

Very hot

Highs near 37°C in July.

About 107 days a year above 32 °C

❄️ Winters

Chilly

Lows near 2°C in December.

About 24 freezing nights a year

🌧️ Rain

Very dry

About 216 mm of rain a year.

Wettest in January

⛅ Sky & trend

Fairly sunny

More sun than cloud through the year.

+1.0 °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

Hanford climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	13	17	21	24	29	33	37	36	33	27	19	14
Avg temp (°C)	8	11	14	17	21	25	28	27	24	19	12	8
Avg low (°C)	3	5	7	9	13	16	19	18	15	11	5	2
Precipitation (mm)	45	36	39	18	8	3	1	0	2	11	17	37

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	13	17	21	24	29	33
Avg temp (°C)	8	11	14	17	21	25
Avg low (°C)	3	5	7	9	13	16
Precipitation (mm)	45	36	39	18	8	3

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	37	36	33	27	19	14
Avg temp (°C)	28	27	24	19	12	8
Avg low (°C)	19	18	15	11	5	2
Precipitation (mm)	1	0	2	11	17	37

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	8	7	6	4	2	0.6	0.1	0.2	0.7	2	4	7
Days with high ≥ 32°C (days)	—	—	0.1	2	7	19	29	28	19	4	—	—
Days with low ≤ 0°C (days)	8	3	0.3	—	0.0	—	—	—	—	—	2	11

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	8	7	6	4	2	0.6
Days with high ≥ 32°C (days)	—	—	0.1	2	7	19
Days with low ≤ 0°C (days)	8	3	0.3	—	0.0	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	0.1	0.2	0.7	2	4	7
Days with high ≥ 32°C (days)	29	28	19	4	—	—
Days with low ≤ 0°C (days)	—	—	—	—	2	11

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	60	52	46	38	30	19	16	13	16	26	43	56
Clear days (≤ 30% cloud)	6	9	12	14	19	24	26	27	24	21	12	7
Partly cloudy days (30–70%)	12	9	10	10	8	5	4	3	4	7	12	13
Cloudy days (≥ 70%)	13	10	9	6	4	2	1	0.9	2	3	7	11
Relative humidity (%)	63	66	65	59	48	32	25	24	28	37	49	58
Wind speed (m/s)	1.4	1.4	1.5	1.7	1.8	1.9	1.7	1.6	1.5	1.5	1.3	1.4

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	60	52	46	38	30	19
Clear days (≤ 30% cloud)	6	9	12	14	19	24
Partly cloudy days (30–70%)	12	9	10	10	8	5
Cloudy days (≥ 70%)	13	10	9	6	4	2
Relative humidity (%)	63	66	65	59	48	32
Wind speed (m/s)	1.4	1.4	1.5	1.7	1.8	1.9

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	16	13	16	26	43	56
Clear days (≤ 30% cloud)	26	27	24	21	12	7
Partly cloudy days (30–70%)	4	3	4	7	12	13
Cloudy days (≥ 70%)	1	0.9	2	3	7	11
Relative humidity (%)	25	24	28	37	49	58
Wind speed (m/s)	1.7	1.6	1.5	1.5	1.3	1.4

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Hanford 1 S (NOAA GHCN station USC00043747), about 2 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 →