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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 109°F, while the coldest is December averaging around 44°F at night. Precipitation totals about 3 inches a year and is strongly seasonal — December alone averages 0.8 inches while June barely receives 0.01 inches.

☀️ Summers

Extreme heat

Highs near 109°F in August.

About 146 days a year above 90 °F

❄️ Winters

Cool

Lows near 44°F in December.

About 2 freezing nights a year

🌧️ Rain

Very dry

About 3 in of rain a year.

Wettest in December

⛅ Sky & trend

Fairly sunny

More sun than cloud through the year.

−0.5 °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

Yuma climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	71	75	82	89	97	106	109	109	104	93	79	69
Avg temp (°F)	58	61	67	72	79	88	92	93	86	76	65	56
Avg low (°F)	45	47	52	56	62	69	76	77	69	59	50	44
Precipitation (in)	0.4	0.3	0.4	0.1	0.1	0.0	0.3	0.3	0.1	0.2	0.3	0.8

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	71	75	82	89	97	106
Avg temp (°F)	58	61	67	72	79	88
Avg low (°F)	45	47	52	56	62	69
Precipitation (in)	0.4	0.3	0.4	0.1	0.1	0.0

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	109	109	104	93	79	69
Avg temp (°F)	92	93	86	76	65	56
Avg low (°F)	76	77	69	59	50	44
Precipitation (in)	0.3	0.3	0.1	0.2	0.3	0.8

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 ≥ 90°F (days)	—	0.4	5	12	20	22	23	23	22	16	2	—
Days with low ≤ 32°F (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 ≥ 90°F (days)	—	0.4	5	12	20	22
Days with low ≤ 32°F (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 ≥ 90°F (days)	23	23	22	16	2	—
Days with low ≤ 32°F (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 (mph)	4.8	4.9	5.0	5.7	5.7	5.7	6.2	5.9	4.9	4.7	4.7	4.7

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 (mph)	4.8	4.9	5.0	5.7	5.7	5.7

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 (mph)	6.2	5.9	4.9	4.7	4.7	4.7

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 →