Photo: Ken Lund from Reno, Nevada, USA · CC BY-SA 2.0Precipitation in Pomeroy trails that of 91% of U.S. towns: 17 inches a year
Expect July afternoons of about 86°. A year here swings 60° from midwinter lows to midsummer highs. Its January nights stay gentler than in 69% of U.S. towns. Homes need heating from October to April, the months averaging under 50°.
A year in Pomeroy at a glance
Each month’s typical high and low, and what it brings.
What stands out about Pomeroy’s climate
Compared with towns across the U.S., with Pomeroy’s place in Washington beside it.
What a year in Pomeroy feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 155 frost-free days a year
In half of years the last 32° night comes by May 2 and the first by October 4. Frost and day counts come from NOAA’s station at Pomeroy, WA, 0.6 miles from the town’s center, at about the same height.
The 2023 USDA map puts Pomeroy’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 3°. 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 8 inches of snow a winter
Snow, measured at Pomeroy, WA, falls mostly in December. Precipitation (rain plus melted snow) adds up to 17 inches a year; December is the wettest month and August the driest. Rain or snow falls on about 102 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Pomeroy
94% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Pomeroy, WA.
Living with Pomeroy’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
155 frost-free days in zone 7a. The last frost comes by May 2 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 4.
Months with highs of 62–84° and lows of 40° or more: May, June and September. 0.1 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Pomeroy from natural hazards, river flooding is the largest share (81%); heat waves, cold waves, winter storms and ice storms together are 5%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Pomeroy and similar climates
TownRatings has no climate map of the towns around Pomeroy yet.
Climates most like Pomeroy’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Pomeroy, WA | 28° | 86° | 17" | 8.4" |
| Silver City, NM | 26° | 87° | 16" | 13" |
| Indian Hills, NV | 25° | 86° | 14" | 14" |
| The Dalles, OR | 31° | 88° | 15" | 5.5" |
| Prescott, AZ | 26° | 90° | 15" | 10" |
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 Pomeroy averaged 1.5° warmer than the 1900s. The biggest change is in January (+4.4°).
A bigger shift than in 61% 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 Pomeroy compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Pomeroy’s place among Washington’s.
Pomeroy weather by month
Highs, lows and precipitation from NOAA’s grid at Pomeroy’s center; snow, wet days and snow on the ground from Pomeroy, WA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 40° | 28° | 2.1" | 2.2" | 12 | 24° – 40° |
| February | 45° | 29° | 1.6" | 1.2" | 10 | 28° – 43° |
| March | 52° | 33° | 1.9" | 0.8" | 12 | 38° – 47° |
| April | 60° | 37° | 1.7" | 0.1" | 10 | 43° – 55° |
| May | 68° | 43° | 1.6" | 0.0" | 9 | 51° – 61° |
| June | 75° | 48° | 1.4" | 0.0" | 7 | 57° – 70° |
| July | 86° | 54° | 0.5" | 0.0" | 3 | 63° – 75° |
| August | 86° | 53° | 0.4" | 0.0" | 3 | 64° – 74° |
| September | 76° | 46° | 0.7" | 0.0" | 4 | 57° – 65° |
| October | 62° | 38° | 1.4" | 0.0" | 7 | 43° – 56° |
| November | 47° | 32° | 2.1" | 0.5" | 13 | 32° – 46° |
| December | 39° | 27° | 2.1" | 3.6" | 12 | 27° – 37° |
| Year | 61° | 39° | 17.4" | 8.4" | 102 |
How much a month can swing
A normal is an average. January swings the most: from 1991 to 2020 its average ranged from 24° to 40°. September is the most reliable, staying within 8°.
Where Pomeroy’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 Pomeroy’s center.
- Snow: Pomeroy, WA (NOAA station in town).
- Frost, freezing nights, 90° and 100° days, heating and cooling: Pomeroy, WA, 0.6 miles from the town’s center, at about the same height; 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 Pomeroy’s climate
What is the weather like in Pomeroy?
A typical July afternoon reaches 86°, a January night drops to 28°, and about 8 inches of snow falls in a normal winter. Milder January nights than 69% of U.S. towns; hotter July afternoons than 58% of U.S. towns.
How cold does it get in Pomeroy in winter?
December nights average 27°. About 125 nights a year reach 32° or below and 1 reach 0° or below. In the coldest December of the last 30 years the month averaged 27°.
How much snow does Pomeroy get?
About 8.4 inches in a normal winter at Pomeroy, WA, most of it in December.
How hot does it get in Pomeroy?
July, with a typical high of 86° and a low of 54°. About 27 days a year reach 90° and 2 reach 100° (Pomeroy, WA).
When is the first and last frost in Pomeroy?
In half of years the last spring frost (32°) comes by May 2 and the first fall frost by October 4, about 155 frost-free days, at Pomeroy, WA.
What growing zone is Pomeroy in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 3°.
What is the best time of year to visit Pomeroy?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Pomeroy getting warmer?
Yes: 1991–2020 averaged 1.5° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 61% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Pomeroy.
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.