Photo: Gary Halvorson, Oregon State Archives · CC BY 4.0Dayville reaches 100° on about 15 days a year, more than 94% of U.S. towns
Deep winter brings January lows near 25°. Its yearly precipitation falls short of 97% of U.S. towns. The latest 30-year average runs 1.3° warmer than 1901–2000’s, with January up the most. Radiators earn their keep from November to April, the months that average under 50°.
A year in Dayville at a glance
Each month’s typical high and low, and what it brings.
What stands out about Dayville’s climate
Compared with towns across the U.S., with Dayville’s place in Oregon beside it.
What a year in Dayville 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 4 and the first by October 6. Frost and day counts come from NOAA’s station at Dayville 8 Nw, OR, 8 miles from the town’s center, 110 ft lower.
The 2023 USDA map puts Dayville’s center in zone 7a: 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 11 inches of rain a year
May is the wettest month and August the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Dayville
87% 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 Dayville 8 Nw, OR.
Living with Dayville’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 4 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 6.
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 Dayville from natural hazards, river flooding is the largest share (66%); heat waves, cold waves, winter storms and ice storms together are 3%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Dayville and similar climates
TownRatings has no climate map of the towns around Dayville 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 Dayville averaged 1.3° warmer than the 1900s. The biggest change is in January (+3.5°).
A smaller 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 Dayville compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Dayville’s place among Oregon’s.
Dayville weather by month
Highs, lows and precipitation from NOAA’s grid at Dayville’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 45° | 25° | 1.2" | 29° – 41° |
| February | 50° | 26° | 0.7" | 31° – 45° |
| March | 58° | 30° | 0.9" | 40° – 50° |
| April | 64° | 34° | 1.2" | 45° – 55° |
| May | 73° | 41° | 1.6" | 51° – 63° |
| June | 81° | 47° | 1.1" | 59° – 72° |
| July | 92° | 52° | 0.4" | 61° – 77° |
| August | 91° | 50° | 0.3" | 66° – 74° |
| September | 82° | 42° | 0.4" | 58° – 66° |
| October | 68° | 34° | 0.9" | 45° – 58° |
| November | 53° | 29° | 1.1" | 35° – 47° |
| December | 44° | 24° | 1.3" | 28° – 38° |
| Year | 67° | 36° | 10.8" |
How much a month can swing
A normal is an average. July swings the most: from 1991 to 2020 its average ranged from 61° to 77°. September is the most reliable, staying within 8°.
Where Dayville’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 Dayville’s center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Dayville 8 Nw, OR, 8 miles from the town’s center, 110 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 Dayville’s climate
What is the weather like in Dayville?
A typical July afternoon reaches 92°, a January night drops to 25°. Milder January nights than 64% of U.S. towns; hotter July afternoons than 88% of U.S. towns.
How cold does it get in Dayville in winter?
December nights average 24°. About 123 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 28°.
How hot does it get in Dayville?
July, with a typical high of 92° and a low of 52°. About 62 days a year reach 90° and 15 reach 100° (Dayville 8 Nw, OR).
When is the first and last frost in Dayville?
In half of years the last spring frost (32°) comes by May 4 and the first fall frost by October 6, about 155 frost-free days, at Dayville 8 Nw, OR.
What growing zone is Dayville in?
Zone 7a 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 Dayville?
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 Dayville getting warmer?
Yes: 1991–2020 averaged 1.3° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 53% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Dayville.
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.