Photo: Marine 69-71 · CC BY-SA 4.0Less rain and snow falls on Dewey-Humboldt than on 93% of U.S. towns: 14 inches a year
January nights here settle around 28°. From frosty January to warm July, readings climb 66°. Summer afternoons here are warmer than in 91% of U.S. towns. Tender plants can go out after about April 20; in half of years the first frost comes by October 27.
A year in Dewey-Humboldt at a glance
Each month’s typical high and low, and what it brings.
What stands out about Dewey-Humboldt’s climate
Compared with towns across the U.S., with Dewey-Humboldt’s place in Arizona beside it.
What a year in Dewey-Humboldt feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 188 frost-free days a year
In half of years the last 32° night comes by April 20 and the first by October 27. Frost and day counts come from NOAA’s station at Prescott Love Fld, AZ, 13 miles from the town’s center, 310 ft higher.
The 2023 USDA map puts Dewey-Humboldt’s center in zone 8a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 12°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 14 inches of rain a year
August is the wettest month and June the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Dewey-Humboldt
79% of the work is heating. Months averaging under 55° run from November through March.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Prescott Love Fld, AZ.
Living with Dewey-Humboldt’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
188 frost-free days in zone 8a. The last frost comes by Apr 20 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 27.
Months with highs of 62–84° and lows of 40° or more: May and October. 9.5 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Dewey-Humboldt from natural hazards, wildfire is the largest share (52%); heat waves, cold waves, winter storms and ice storms together are 2%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Dewey-Humboldt and similar climates
TownRatings has no climate map of the towns around Dewey-Humboldt 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 Dewey-Humboldt averaged 2.0° warmer than the 1900s. The biggest change is in March (+3.1°).
A bigger shift than in 90% 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 Dewey-Humboldt compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Dewey-Humboldt’s place among Arizona’s.
Dewey-Humboldt weather by month
Highs, lows and precipitation from NOAA’s grid at Dewey-Humboldt’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 55° | 28° | 1.5" | 37° – 48° |
| February | 58° | 31° | 1.6" | 38° – 51° |
| March | 64° | 35° | 1.3" | 43° – 56° |
| April | 71° | 40° | 0.5" | 49° – 61° |
| May | 80° | 47° | 0.4" | 57° – 68° |
| June | 91° | 55° | 0.2" | 67° – 78° |
| July | 93° | 63° | 1.9" | 75° – 81° |
| August | 91° | 62° | 2.5" | 73° – 80° |
| September | 86° | 55° | 1.4" | 67° – 73° |
| October | 76° | 44° | 0.9" | 56° – 66° |
| November | 64° | 34° | 0.9" | 42° – 55° |
| December | 55° | 27° | 1.4" | 37° – 46° |
| Year | 74° | 43° | 14.4" |
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 43° to 56°. September is the most reliable, staying within 6°.
Where Dewey-Humboldt’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 Dewey-Humboldt’s center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Prescott Love Fld, AZ, 13 miles from the town’s center, 310 ft higher; the nearest station that passes our checks for distance, height and agreement with the grid.
- 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 Dewey-Humboldt’s climate
What is the weather like in Dewey-Humboldt?
A typical July afternoon reaches 93°, a January night drops to 28°. Milder January nights than 70% of U.S. towns; hotter July afternoons than 91% of U.S. towns.
How cold does it get in Dewey-Humboldt in winter?
December nights average 27°. About 113 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 37°.
How hot does it get in Dewey-Humboldt?
July, with a typical high of 93° and a low of 63°. About 50 days a year reach 90° and 2 reach 100° (Prescott Love Fld, AZ).
When is the first and last frost in Dewey-Humboldt?
In half of years the last spring frost (32°) comes by April 20 and the first fall frost by October 27, about 188 frost-free days, at Prescott Love Fld, AZ.
What growing zone is Dewey-Humboldt in?
Zone 8a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 12°.
What is the best time of year to visit Dewey-Humboldt?
By one simple rule (highs of 62–84° and lows of 40° or more), May and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Dewey-Humboldt getting warmer?
Yes: 1991–2020 averaged 2.0° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 90% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Dewey-Humboldt.
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.