Photo: Forest Service Northern Region from Missoula, MT, USA · Public domainPrecipitation in Culdesac trails that of 91% of U.S. towns: 18 inches a year
January mornings start at about 27°. Summer afternoons here are warmer than in 71% of U.S. towns. Compared with 1901–2000, the average now sits 1.1° higher. Homes need heating from October to April, the months averaging under 50°.
A year in Culdesac at a glance
Each month’s typical high and low, and what it brings.
What stands out about Culdesac’s climate
Compared with towns across the U.S., with Culdesac’s place in Idaho beside it.
What a year in Culdesac feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 200 frost-free days a year
In half of years the last 32° night comes by April 6 and the first by October 26. Frost and day counts come from NOAA’s station at Lewiston Nez Perce Co Airport, 16 miles from the town’s center, 300 ft lower.
The 2023 USDA map puts Culdesac’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 18 inches of snow a winter
Snow, measured at Dworshak Fish Hatchery, ID, falls mostly in December. Precipitation (rain plus melted snow) adds up to 18 inches a year; May is the wettest month and August the driest. Rain or snow falls on about 140 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Culdesac
85% of the work is heating. 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 Lewiston Nez Perce Co Airport.
Living with Culdesac’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
200 frost-free days in zone 7a. The last frost comes by Apr 6 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 26.
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 Culdesac from natural hazards, river flooding is the largest share (78%); heat waves, cold waves, winter storms and ice storms together are 3%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Culdesac and similar climates
TownRatings has no climate map of the towns around Culdesac yet.
Climates most like Culdesac’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 |
|---|---|---|---|---|
| Culdesac, ID | 27° | 89° | 18" | 18" |
| Silver City, NM | 26° | 87° | 16" | 13" |
| Cold Springs, NV | 23° | 88° | 13" | 17" |
| Prescott, AZ | 26° | 90° | 15" | 10" |
| Madras, OR | 26° | 87° | 11" | 14" |
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 Culdesac averaged 1.1° warmer than the 1900s. The biggest change is in January (+3.4°).
A smaller shift than in 70% 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 Culdesac compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Culdesac’s place among Idaho’s.
Culdesac weather by month
Highs, lows and precipitation from NOAA’s grid at Culdesac’s center; snow, wet days and snow on the ground from Dworshak Fish Hatchery, ID. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 40° | 27° | 1.4" | 6.3" | 17 | 6 | 24° – 39° |
| February | 45° | 28° | 1.3" | 1.7" | 14 | 2 | 28° – 44° |
| March | 54° | 32° | 1.9" | 0.7" | 15 | 0 | 37° – 49° |
| April | 61° | 37° | 2.1" | 0.0" | 14 | 0 | 44° – 55° |
| May | 71° | 43° | 2.3" | 0.0" | 12 | 0 | 52° – 62° |
| June | 77° | 49° | 2.0" | 0.0" | 11 | 0 | 59° – 70° |
| July | 89° | 54° | 0.6" | 0.0" | 4 | 0 | 62° – 76° |
| August | 89° | 53° | 0.6" | 0.0" | 4 | 0 | 66° – 73° |
| September | 79° | 45° | 0.8" | 0.0" | 6 | 0 | 59° – 67° |
| October | 63° | 37° | 1.6" | 0.0" | 12 | 0 | 44° – 56° |
| November | 47° | 31° | 1.8" | 0.7" | 16 | 1 | 32° – 45° |
| December | 39° | 26° | 1.5" | 8.1" | 16 | 5 | 26° – 37° |
| Year | 63° | 38° | 17.9" | 17.5" | 140 | 13 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 28° to 44°. August is the most reliable, staying within 7°.
Where Culdesac’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 Culdesac’s center.
- Snow: Dworshak Fish Hatchery, ID.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Lewiston Nez Perce Co Airport, 16 miles from the town’s center, 300 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 Culdesac’s climate
What is the weather like in Culdesac?
A typical July afternoon reaches 89°, a January night drops to 27°, and about 18 inches of snow falls in a normal winter. Milder January nights than 67% of U.S. towns; hotter July afternoons than 71% of U.S. towns.
How cold does it get in Culdesac in winter?
December nights average 26°. About 80 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 26°.
How much snow does Culdesac get?
About 18 inches in a normal winter at Dworshak Fish Hatchery, ID, most of it in December, with snow on the ground about 13 days a year.
How hot does it get in Culdesac?
July, with a typical high of 89° and a low of 54°. About 44 days a year reach 90° and 9 reach 100° (Lewiston Nez Perce Co Airport).
When is the first and last frost in Culdesac?
In half of years the last spring frost (32°) comes by April 6 and the first fall frost by October 26, about 200 frost-free days, at Lewiston Nez Perce Co Airport.
What growing zone is Culdesac 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 Culdesac?
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 Culdesac getting warmer?
Yes: 1991–2020 averaged 1.1° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 70% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Culdesac.
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.