Cascade Valley is among the driest of U.S. towns: 8 inches of precipitation a year
Deep winter brings January lows near 24°. Temperatures cover 66° across the year, low to high. By July afternoons alone, it runs hotter than 75% of U.S. towns. Keep the boiler serviced for the months from November to March, which average under 50°.
A year in Cascade Valley at a glance
Each month’s typical high and low, and what it brings.
What stands out about Cascade Valley’s climate
Compared with towns across the U.S., with Cascade Valley’s place in Washington beside it.
What a year in Cascade Valley feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 165 frost-free days a year
In half of years the last 32° night comes by April 27 and the first by October 8. Frost and day counts come from NOAA’s station at Moses Lake Grant Co Airport, 5 miles from the town’s center, 120 ft higher.
The 2023 USDA map puts Cascade Valley’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 1°. 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 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 Cascade Valley
90% 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 Moses Lake Grant Co Airport.
Living with Cascade Valley’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
165 frost-free days in zone 7a. The last frost comes by Apr 27 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 8.
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 Cascade Valley from natural hazards, river flooding is the largest share (61%); heat waves, cold waves, winter storms and ice storms together are 29%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Cascade Valley and similar climates
TownRatings has no climate map of the towns around Cascade Valley 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 Cascade Valley 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 Cascade Valley compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Cascade Valley’s place among Washington’s.
Cascade Valley weather by month
Highs, lows and precipitation from NOAA’s grid at Cascade Valley’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 37° | 24° | 1.0" | 21° – 37° |
| February | 45° | 27° | 0.6" | 25° – 42° |
| March | 55° | 32° | 0.7" | 36° – 49° |
| April | 64° | 37° | 0.7" | 45° – 57° |
| May | 74° | 46° | 0.7" | 54° – 65° |
| June | 80° | 52° | 0.6" | 62° – 75° |
| July | 90° | 58° | 0.3" | 65° – 78° |
| August | 88° | 56° | 0.2" | 66° – 75° |
| September | 79° | 48° | 0.2" | 60° – 67° |
| October | 63° | 38° | 0.7" | 46° – 57° |
| November | 47° | 29° | 0.9" | 32° – 46° |
| December | 36° | 24° | 1.1" | 23° – 36° |
| Year | 63° | 39° | 7.7" |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 25° to 42°. September is the most reliable, staying within 7°.
Where Cascade Valley’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 Cascade Valley’s center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Moses Lake Grant Co Airport, 5 miles from the town’s center, 120 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 Cascade Valley’s climate
What is the weather like in Cascade Valley?
A typical July afternoon reaches 90°, a January night drops to 24°. Milder January nights than 60% of U.S. towns; hotter July afternoons than 75% of U.S. towns.
How cold does it get in Cascade Valley in winter?
December nights average 24°. About 129 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 23°.
How hot does it get in Cascade Valley?
July, with a typical high of 90° and a low of 58°. About 43 days a year reach 90° and 7 reach 100° (Moses Lake Grant Co Airport).
When is the first and last frost in Cascade Valley?
In half of years the last spring frost (32°) comes by April 27 and the first fall frost by October 8, about 165 frost-free days, at Moses Lake Grant Co Airport.
What growing zone is Cascade Valley in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 1°.
What is the best time of year to visit Cascade Valley?
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 Cascade Valley 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 Cascade Valley.
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.