Flood Warning
* WHAT...Flooding caused by excessive rainfall is expected.
* WHERE...Maricopa County in south central Arizona...
* WHEN...Until 745 PM MST.
* IMPACTS...Flooding of rivers, creeks, streams, and other low-lying
and flood-prone locations is imminent or occurring.
* ADDITIONAL D…
Flood Warning
* WHAT...Flooding caused by excessive rainfall continues.
* WHERE...Maricopa County in south central Arizona...
* WHEN...Until 1045 PM MST.
* IMPACTS...Flooding of rivers, creeks, streams, and other low-lying
and flood-prone locations is imminent or occurring.
* ADDITIONAL DE…
Flood Watch
* WHAT...Flooding caused by excessive rainfall continues to be
possible.
* WHERE...A portion of south central Arizona, including all of
Maricopa County, Northern and Western Pinal County, and Southern
Gila County.
* WHEN...Until 11 PM MST this evening.
* IMPACTS...Excessive ru…
Tomorrow in Phoenix looks
overcast, with a high of 90°
and an overnight low of 76°.
There is a 57% chance of rain - plan accordingly.
Winds top out near 11 mph,
and the UV index reaches 8 (very high).
Phoenix works on a dry budget: 11.1 inches (282 mm) of precipitation a year, spread over roughly 34 days. Temperature does the varying instead, from 65°F (18°C) on a typical January afternoon to 106°F (41°C) in July, with nights 14°C below the day.
Phoenix weather: quick facts
Hottest month: July - highs near 106°F (41°C)
Coldest month: January - highs near 65°F (18°C)
Decade extremes (2015-2024): 118°F (48°C) high · 28°F (-2°C) low
Wettest month: July (5 rainy days) · Sunniest: June (13.2 h sun/day)
Climate type:semi-arid
Annual swing: 24°C between the average warmest and coolest month · day to night: 14°C
Months averaging 30°C or hotter: 7
Average humidity: 34%
Temperatures through the year
Warmth peaks in July: highs of 106°F (41°C), lows of 84°F (29°C). January bottoms out at 65°F (18°C) in daylight, 42°F (6°C) after dark. Five of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is November through March.
Rain, sun and snow
Between the average July and the average January lie 24°C, a wider spread than roughly 77% of the cities we track. Precipitation concentrates in July - 1.9 inches (49 mm) on 5 days - and thins out by May. The gridded 2015-2024 daily record for this location tops out at 118°F (48°C) and bottoms at 28°F (-2°C) - decade extremes, not all-time station records.
Season by season
Spring (March through May)
Spring brings hot afternoons here - highs near 86°F (30°C), nights near 59°F (15°C), and precipitation is sparse, near 1.3 inches (34 mm) for the season. Daylight is generous - around 12.0 hours of sun a day.
Summer (June through August)
Summer brings serious heat here - highs near 105°F (41°C), nights near 82°F (28°C), and rain comes on about 11 days over the three months. Daylight is generous - around 12.5 hours of sun a day.
Fall (September through November)
Through fall, Phoenix sits firmly in the heat: 88°F (31°C) by day, 64°F (18°C) after dark, and precipitation is sparse, near 2.5 inches (63 mm) for the season. Daylight is generous - around 10.4 hours of sun a day.
Winter (December through February)
Winter in Phoenix is crisp but comfortable, with daytime highs averaging 67°F (20°C) and nights around 44°F (6°C); rain comes on about 11 days over the three months.
Average temperatures in Phoenix by month
Monthly averages for Phoenix based on 2015–2024 weather data.
Effectively no. The 2015-2024 record for Phoenix shows no regular measurable snowfall.
Which months are driest in Phoenix?
4 months average under 20 mm of rain, with May the driest at 3 mm (0.1 in).
What is the best month to go to Phoenix?
November to March is the sweet spot for Phoenix - temperatures sit either side of the peak heat rather than in it. Expect 71°F (22°C) in the afternoon and around 3 days of rain in a typical month of it. For the same question asked the other way round, see where else is warm in November.
When is Phoenix at its coldest?
January, with highs of 65°F (18°C) and lows near 42°F (6°C). The coldest day in the 2015-2024 record fell to 28°F (-2°C).
What is the rainiest month in Phoenix?
July, at 1.9 inches (49 mm) over about 5 days. May is the driest month, at 3 mm (0.1 in).
When is Phoenix at its hottest?
July, averaging 106°F (41°C) by day and 84°F (29°C) overnight. The hottest single day in our 2015-2024 record for this location reached 118°F (48°C).