Photo: A. Balet · CC BY 3.0Few U.S. towns get less rain and snow than Loomis: 11 inches a year
In July the day’s top temperature is typically 87°. June is the wettest month, August the driest. Summer afternoons here are warmer than in 60% of U.S. towns. Homes need heating from October to April, the months averaging under 50°.
A year in Loomis at a glance
Each month’s typical high and low, and what it brings.
What stands out about Loomis’ climate
Compared with towns across the U.S., with Loomis’ place in Washington beside it.
What a year in Loomis feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 168 frost-free days a year
In half of years the last 32° night comes by April 26 and the first by October 10. Frost and day counts come from NOAA’s station at Tonasket 4 Nne, WA, 10 miles from the town’s center, 430 ft lower.
The 2023 USDA map puts Loomis’ center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 0°. 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 11 inches of rain a year
June is the wettest month and August the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Loomis
92% 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 Tonasket 4 Nne, WA.
Living with Loomis’ climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
168 frost-free days in zone 7a. The last frost comes by Apr 26 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 10.
Months with highs of 62–84° and lows of 40° or more: May, June and September.
Parks & trails →Of the yearly building losses FEMA expects in Loomis from natural hazards, river flooding is the largest share (46%); heat waves, cold waves, winter storms and ice storms together are 10%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Loomis and similar climates
TownRatings has no climate map of the towns around Loomis 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 Loomis averaged 1.2° warmer than the 1900s. The biggest change is in January (+3.9°).
A smaller shift than in 60% 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 Loomis compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Loomis’ place among Washington’s.
Loomis weather by month
Highs, lows and precipitation from NOAA’s grid at Loomis’ center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 34° | 23° | 1.2" | 20° – 34° |
| February | 41° | 25° | 0.8" | 22° – 40° |
| March | 52° | 31° | 0.8" | 36° – 47° |
| April | 62° | 37° | 0.8" | 44° – 57° |
| May | 71° | 45° | 1.3" | 53° – 64° |
| June | 77° | 51° | 1.4" | 60° – 72° |
| July | 87° | 57° | 0.7" | 65° – 76° |
| August | 86° | 56° | 0.6" | 65° – 76° |
| September | 76° | 48° | 0.6" | 59° – 67° |
| October | 60° | 38° | 0.8" | 45° – 54° |
| November | 43° | 30° | 1.0" | 31° – 43° |
| December | 34° | 23° | 1.4" | 21° – 34° |
| Year | 60° | 39° | 11.4" |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 22° to 40°. September is the most reliable, staying within 9°.
Where Loomis’ 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 Loomis’ center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Tonasket 4 Nne, WA, 10 miles from the town’s center, 430 ft lower; 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 Loomis’ climate
What is the weather like in Loomis?
A typical July afternoon reaches 87°, a January night drops to 23°. Milder January nights than 55% of U.S. towns; hotter July afternoons than 60% of U.S. towns.
How cold does it get in Loomis in winter?
December nights average 23°. About 134 nights a year reach 32° or below and 2 reach 0° or below. In the coldest December of the last 30 years the month averaged 21°.
How hot does it get in Loomis?
July, with a typical high of 87° and a low of 57°. About 30 days a year reach 90° and 2 reach 100° (Tonasket 4 Nne, WA).
When is the first and last frost in Loomis?
In half of years the last spring frost (32°) comes by April 26 and the first fall frost by October 10, about 168 frost-free days, at Tonasket 4 Nne, WA.
What growing zone is Loomis in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 0°.
What is the best time of year to visit Loomis?
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 Loomis getting warmer?
Yes: 1991–2020 averaged 1.2° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 60% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Loomis.
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.