Photo: unknown; rotated and color-corrected by Howcheng. · Public domainSummerhaven’s winters are milder than most of the U.S.; July afternoons average 74°
A typical July afternoon reaches 74°, a January night drops to 27°.
A year in Summerhaven at a glance
Each month’s typical high and low, and what it brings.
What stands out about Summerhaven’s climate
Compared with towns across the U.S., with Summerhaven’s place in Arizona beside it.
What a year in Summerhaven feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 29 inches of rain a year
July is the wettest month and May the driest.
Rain + melted snow by month
Inches of water
Living with Summerhaven’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 7b.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 17 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Summerhaven from natural hazards, river flooding is the largest share (70%); heat waves, cold waves, winter storms and ice storms together are 17%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Summerhaven and similar climates
TownRatings has no climate map of the towns around Summerhaven yet.
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Summerhaven averaged 1.4° warmer than the 1900s. The biggest change is in March (+2.4°).
A bigger shift than in 50% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Summerhaven compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Summerhaven’s place among Arizona’s.
Summerhaven weather by month
Highs, lows and precipitation from NOAA’s grid at Summerhaven’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 45° | 27° | 3.2" | 31° – 41° |
| February | 46° | 28° | 3.3" | 31° – 42° |
| March | 51° | 30° | 2.3" | 34° – 46° |
| April | 56° | 35° | 0.9" | 39° – 50° |
| May | 66° | 42° | 0.5" | 48° – 58° |
| June | 75° | 51° | 0.6" | 58° – 66° |
| July | 74° | 54° | 4.5" | 61° – 66° |
| August | 73° | 53° | 4.3" | 60° – 68° |
| September | 69° | 49° | 2.9" | 55° – 62° |
| October | 62° | 41° | 1.2" | 48° – 55° |
| November | 52° | 34° | 2.1" | 35° – 50° |
| December | 45° | 28° | 3.0" | 32° – 40° |
| Year | 59° | 39° | 28.8" |
How much a month can swing
A normal is an average. November swings the most: from 1991 to 2020 its average ranged from 35° to 50°. July is the most reliable, staying within 6°.
Where Summerhaven’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Summerhaven’s center.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Summerhaven’s climate
What is the weather like in Summerhaven?
A typical July afternoon reaches 74°, a January night drops to 27°. Milder January nights than 68% of U.S. towns; cooler July afternoons than all but 179 U.S. towns.
How cold does it get in Summerhaven in winter?
January nights average 27°. In the coldest January of the last 30 years the month averaged 31°.
How hot does it get in Summerhaven?
July, with a typical high of 74°. 90° days are rare.
What growing zone is Summerhaven in?
Zone 7b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 7°.
What is the best time of year to visit Summerhaven?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Summerhaven getting warmer?
Yes: 1991–2020 averaged 1.4° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 50% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Summerhaven.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.