Siletz Agency Site · Photo: Ian Poellet · CC BY-SA 3.0Siletz’s winters are milder and less snowy than most of the U.S.
A typical July afternoon reaches 73°, a January night drops to 38°, and snow is almost unheard of.
A year in Siletz at a glance
Each month’s typical high and low, and what it brings.
What stands out about Siletz’s climate
Compared with towns across the U.S., with Siletz’s place in Oregon beside it.
What a year in Siletz feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 227 frost-free days a year
In half of years the last 32° night comes by April 4 and the first by November 16. Frost and day counts come from NOAA’s station at Otis 2 Ne, OR, 21 miles from the town’s center, at about the same height.
The 2023 USDA map puts Siletz’s center in zone 9b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 26°. 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 84 inches of rain a year
December is the wettest month and July the driest. Rain falls on about 205 days a year. Snow is rare: about 0.1" in a normal year at Otis 2 Ne, OR, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Siletz
99% 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 Otis 2 Ne, OR.
Living with Siletz’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
227 frost-free days in zone 9b. The last frost comes by Apr 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 Nov 16.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August, September and October. 0.4 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Siletz from natural hazards, river flooding is the largest share (67%); heat waves, cold waves, winter storms and ice storms together are 2%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Siletz and similar climates
TownRatings has no climate map of the towns around Siletz yet.
Climates most like Siletz’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 |
|---|---|---|---|---|
| Siletz, OR | 38° | 73° | 84" | 0.1" |
| Aberdeen, WA | 37° | 68° | 80" | 0.5" |
| Crescent City, CA | 42° | 64° | 69" | 0.0" |
| Brevard, NC | 27° | 83° | 69" | 7.1" |
| Waipio Acres, HI | 61° | 82° | 64" | 0.0" |
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 Siletz averaged 0.6° warmer than the 1900s. The biggest change is in January (+1.9°).
A smaller shift than in 96% 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 Siletz compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Siletz’s place among Oregon’s.
Siletz weather by month
Highs, lows and precipitation from NOAA’s grid at Siletz’s center; snow, wet days and snow on the ground from Otis 2 Ne, OR. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 50° | 38° | 12.6" | 0.1" | 26 | 0 | 39° – 48° |
| February | 53° | 38° | 9.3" | 0.0" | 21 | 0 | 38° – 51° |
| March | 55° | 38° | 9.8" | 0.0" | 22 | 0 | 43° – 52° |
| April | 59° | 40° | 7.2" | 0.0" | 19 | 0 | 46° – 55° |
| May | 64° | 45° | 4.4" | 0.0" | 15 | 0 | 50° – 58° |
| June | 68° | 49° | 3.0" | 0.0" | 12 | 0 | 55° – 63° |
| July | 73° | 51° | 0.7" | 0.0" | 6 | 0 | 59° – 66° |
| August | 74° | 52° | 1.0" | 0.0" | 7 | 0 | 61° – 67° |
| September | 72° | 49° | 2.7" | 0.0" | 10 | 0 | 58° – 63° |
| October | 63° | 44° | 7.4" | 0.0" | 17 | 0 | 51° – 58° |
| November | 54° | 41° | 12.1" | 0.0" | 24 | 0 | 42° – 51° |
| December | 49° | 37° | 13.8" | 0.0" | 27 | 0 | 38° – 46° |
| Year | 61° | 43° | 84.0" | 0.1" | 205 | 0 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 38° to 51°. September is the most reliable, staying within 6°.
Where Siletz’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 Siletz’s center.
- Snow: Otis 2 Ne, OR.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Otis 2 Ne, OR, 21 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 Siletz’s climate
What is the weather like in Siletz?
A typical July afternoon reaches 73°, a January night drops to 38°, and snow is almost unheard of. Milder January nights than 85% of U.S. towns; cooler July afternoons than all but 128 U.S. towns.
How cold does it get in Siletz in winter?
December nights average 37°. About 32 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 38°.
How much snow does Siletz get?
About 0.1 inches in a normal winter at Otis 2 Ne, OR, so most winters see none.
How hot does it get in Siletz?
July, with a typical high of 73° and a low of 51°. About 2 days a year reach 90° (Otis 2 Ne, OR).
When is the first and last frost in Siletz?
In half of years the last spring frost (32°) comes by April 4 and the first fall frost by November 16, about 227 frost-free days, at Otis 2 Ne, OR.
What growing zone is Siletz in?
Zone 9b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 26°.
What is the best time of year to visit Siletz?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Siletz getting warmer?
Yes: 1991–2020 averaged 0.6° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 96% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Siletz.
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.