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Yuma, Arizona climate

BWh Hot desert

Yuma has a seasonal warm-temperate climate (Hot desert, Köppen BWh). The hottest month is August with an average daily high near 43°C, while the coldest is December averaging around 6°C at night. Precipitation totals about 81 mm a year and is strongly seasonal — December alone averages 19 mm while June barely receives 0 mm.

☀️ Summers

Extreme heat

Highs near 43°C in August.

About 146 days a year above 32 °C

❄️ Winters

Cool

Lows near 6°C in December.

About 2 freezing nights a year

🌧️ Rain

Very dry

About 81 mm of rain a year.

Wettest in December

⛅ Sky & trend

Fairly sunny

More sun than cloud through the year.

−0.3 °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

Yuma climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	22	24	28	31	36	41	43	43	40	34	26	21
Avg temp (°C)	14	16	19	22	26	31	34	34	30	24	18	13
Avg low (°C)	7	8	11	13	17	21	24	25	21	15	10	6
Precipitation (mm)	10	8	9	3	2	0	8	6	3	6	6	19

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	22	24	28	31	36	41
Avg temp (°C)	14	16	19	22	26	31
Avg low (°C)	7	8	11	13	17	21
Precipitation (mm)	10	8	9	3	2	0

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	43	43	40	34	26	21
Avg temp (°C)	34	34	30	24	18	13
Avg low (°C)	24	25	21	15	10	6
Precipitation (mm)	8	6	3	6	6	19

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	2	2	1	0.5	0.2	0.1	0.8	1	1.0	0.5	0.8	1
Days with high ≥ 32°C (days)	—	0.4	5	12	20	22	23	23	22	16	2	—
Days with low ≤ 0°C (days)	0.8	0.4	—	—	—	—	—	—	—	—	0.0	1

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	2	2	1	0.5	0.2	0.1
Days with high ≥ 32°C (days)	—	0.4	5	12	20	22
Days with low ≤ 0°C (days)	0.8	0.4	—	—	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	0.8	1	1.0	0.5	0.8	1
Days with high ≥ 32°C (days)	23	23	22	16	2	—
Days with low ≤ 0°C (days)	—	—	—	—	0.0	1

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	42	43	38	32	28	25	35	34	29	30	35	40
Clear days (≤ 30% cloud)	14	13	15	18	21	23	17	18	21	21	17	15
Partly cloudy days (30–70%)	11	10	11	9	8	5	10	10	7	8	9	11
Cloudy days (≥ 70%)	7	6	5	3	2	2	4	3	2	3	4	6
Relative humidity (%)	47	46	41	35	32	29	36	41	38	35	36	45
Wind speed (km/h)	7.7	7.8	8.1	9.2	9.3	9.3	10.0	9.5	7.8	7.5	7.6	7.5

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	42	43	38	32	28	25
Clear days (≤ 30% cloud)	14	13	15	18	21	23
Partly cloudy days (30–70%)	11	10	11	9	8	5
Cloudy days (≥ 70%)	7	6	5	3	2	2
Relative humidity (%)	47	46	41	35	32	29
Wind speed (km/h)	7.7	7.8	8.1	9.2	9.3	9.3

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	35	34	29	30	35	40
Clear days (≤ 30% cloud)	17	18	21	21	17	15
Partly cloudy days (30–70%)	10	10	7	8	9	11
Cloudy days (≥ 70%)	4	3	2	3	4	6
Relative humidity (%)	36	41	38	35	36	45
Wind speed (km/h)	10.0	9.5	7.8	7.5	7.6	7.5

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Yuma Quartermaster Depot (NOAA GHCN station USC00029656), inside the city.

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 →