Photo: Nomeato · Public domainLoon Lake is drier than 88% of U.S. towns: 23 inches of precipitation a year
Peak summer warmth arrives in July, with afternoons near 84°. Seasons differ by 62°, from the coldest nights to the warmest afternoons. In July, afternoons here are cooler than in 64% of U.S. towns. Keep the boiler serviced for the months from October to April, which average under 50°.
A year in Loon Lake at a glance
Each month’s typical high and low, and what it brings.
What stands out about Loon Lake’s climate
Compared with towns across the U.S., with Loon Lake’s place in Washington beside it.
What a year in Loon Lake feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 112 frost-free days a year
In half of years the last 32° night comes by May 22 and the first by September 14. Frost and day counts come from NOAA’s station at Deer Park Airport, 11 miles from the town’s center, 240 ft lower.
The 2023 USDA map puts Loon Lake’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −5°. 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 23 inches of rain a year
December is the wettest month and August the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Loon Lake
97% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through May.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Deer Park Airport.
Living with Loon Lake’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
112 frost-free days in zone 6a. The last frost comes by May 22 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Sep 14.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 1.3 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Loon Lake from natural hazards, wildfire is the largest share (50%); heat waves, cold waves, winter storms and ice storms together are 11%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Loon Lake and similar climates
TownRatings has no climate map of the towns around Loon Lake 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 Loon Lake averaged 1.4° warmer than the 1900s. The biggest change is in January (+4.1°).
A bigger shift than in 53% 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 Loon Lake compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Loon Lake’s place among Washington’s.
Loon Lake weather by month
Highs, lows and precipitation from NOAA’s grid at Loon Lake’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 33° | 22° | 2.7" | 18° – 33° |
| February | 39° | 23° | 1.9" | 20° – 38° |
| March | 48° | 28° | 2.3" | 33° – 44° |
| April | 57° | 33° | 1.9" | 40° – 53° |
| May | 67° | 41° | 2.1" | 48° – 60° |
| June | 73° | 46° | 2.1" | 56° – 67° |
| July | 84° | 51° | 0.8" | 58° – 73° |
| August | 83° | 50° | 0.6" | 60° – 70° |
| September | 73° | 43° | 0.9" | 54° – 63° |
| October | 57° | 34° | 1.9" | 40° – 51° |
| November | 41° | 27° | 2.9" | 28° – 41° |
| December | 32° | 22° | 3.2" | 20° – 31° |
| Year | 57° | 35° | 23.1" |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 20° to 38°. August is the most reliable, staying within 9°.
Where Loon Lake’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 Loon Lake’s center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Deer Park Airport, 11 miles from the town’s center, 240 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 Loon Lake’s climate
What is the weather like in Loon Lake?
A typical July afternoon reaches 84°, a January night drops to 22°. Colder January nights than 51% of U.S. towns; cooler July afternoons than 64% of U.S. towns.
How cold does it get in Loon Lake in winter?
January nights average 22°. About 174 nights a year reach 32° or below and 5 reach 0° or below. In the coldest January of the last 30 years the month averaged 18°.
How hot does it get in Loon Lake?
July, with a typical high of 84° and a low of 51°. About 22 days a year reach 90° and 1 reach 100° (Deer Park Airport).
When is the first and last frost in Loon Lake?
In half of years the last spring frost (32°) comes by May 22 and the first fall frost by September 14, about 112 frost-free days, at Deer Park Airport.
What growing zone is Loon Lake in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −5°.
What is the best time of year to visit Loon Lake?
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 Loon Lake getting warmer?
Yes: 1991–2020 averaged 1.4° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 53% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Loon Lake.
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.