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Maricopa, Arizona climate

BWh Hot desert

Maricopa has a seasonal warm-temperate climate (Hot desert, Köppen BWh). The hottest month is July with an average daily high near 109°F, while the coldest is December averaging around 35°F at night. Precipitation totals about 7 inches a year and is strongly seasonal — August alone averages 1.0 inches while June barely receives 0.09 inches.

☀️ Summers

Extreme heat

Highs near 109°F in July.

About 181 days a year above 90 °F

❄️ Winters

Chilly

Lows near 35°F in December.

About 31 freezing nights a year

🌧️ Rain

Very dry

About 7 in of rain a year.

Wettest in August

⛅ Sky & trend

Fairly sunny

More sun than cloud through the year.

+2.0 °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

Maricopa climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	69	73	80	88	97	107	109	107	102	91	78	68
Avg temp (°F)	53	56	62	70	78	88	93	92	86	73	60	51
Avg low (°F)	37	40	45	51	59	69	78	77	69	55	43	35
Precipitation (in)	0.8	0.8	0.9	0.2	0.2	0.1	0.7	1.0	0.7	0.5	0.5	0.8

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	69	73	80	88	97	107
Avg temp (°F)	53	56	62	70	78	88
Avg low (°F)	37	40	45	51	59	69
Precipitation (in)	0.8	0.8	0.9	0.2	0.2	0.1

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	109	107	102	91	78	68
Avg temp (°F)	93	92	86	73	60	51
Avg low (°F)	78	77	69	55	43	35
Precipitation (in)	0.7	1.0	0.7	0.5	0.5	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)	4	4	3	1	0.7	0.5	4	4	3	2	2	3
Days with high ≥ 90°F (days)	—	—	3	13	27	30	31	31	29	17	2	—
Days with low ≤ 32°F (days)	11	5	1	0.1	—	—	—	—	—	0.2	2	11

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	4	4	3	1	0.7	0.5
Days with high ≥ 90°F (days)	—	—	3	13	27	30
Days with low ≤ 32°F (days)	11	5	1	0.1	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	4	4	3	2	2	3
Days with high ≥ 90°F (days)	31	31	29	17	2	—
Days with low ≤ 32°F (days)	—	—	—	0.2	2	11

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	42	44	38	31	26	20	43	42	28	27	33	42
Clear days (≤ 30% cloud)	14	12	15	17	21	23	12	13	19	20	17	13
Partly cloudy days (30–70%)	10	8	9	9	8	5	12	12	7	7	9	10
Cloudy days (≥ 70%)	8	8	7	4	3	2	7	6	3	4	5	8
Relative humidity (%)	48	46	40	30	23	17	30	36	34	31	36	47
Wind speed (mph)	4.2	4.3	4.4	5.0	5.0	5.1	4.5	3.8	4.1	4.2	4.3	4.1

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	42	44	38	31	26	20
Clear days (≤ 30% cloud)	14	12	15	17	21	23
Partly cloudy days (30–70%)	10	8	9	9	8	5
Cloudy days (≥ 70%)	8	8	7	4	3	2
Relative humidity (%)	48	46	40	30	23	17
Wind speed (mph)	4.2	4.3	4.4	5.0	5.0	5.1

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	43	42	28	27	33	42
Clear days (≤ 30% cloud)	12	13	19	20	17	13
Partly cloudy days (30–70%)	12	12	7	7	9	10
Cloudy days (≥ 70%)	7	6	3	4	5	8
Relative humidity (%)	30	36	34	31	36	47
Wind speed (mph)	4.5	3.8	4.1	4.2	4.3	4.1

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Maricopa 4 N (NOAA GHCN station USC00025270), about 6 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 →