Few U.S. towns have cooler summers than Westhaven-Moonstone
Midwinter brings lows of about 41°. December is the wettest month, July the driest. By precipitation alone, it ranks wetter than 93% of U.S. towns. Keep the boiler serviced for the months from December to March, which average under 50°.
A year in Westhaven-Moonstone at a glance
Each month’s typical high and low, and what it brings.
What stands out about Westhaven-Moonstone’s climate
Compared with towns across the U.S., with Westhaven-Moonstone’s place in California beside it.
What a year in Westhaven-Moonstone feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 262 frost-free days a year
In half of years the last 32° night comes by March 8 and the first by November 30. Frost and day counts come from NOAA’s station at Arcata Eureka Airport, 4 miles from the town’s center, 310 ft lower.
The 2023 USDA map puts Westhaven-Moonstone’s center in zone 9b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 27°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
About 54 inches of rain a year
December is the wettest month and July the driest. Rain falls on about 128 days a year. Snow is rare: about 0.0" in a normal year at Eureka Wfo Woodley Island, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Westhaven-Moonstone
Nearly all of the work is heating: a normal year has almost no cooling days. 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 Arcata Eureka Airport.
Living with Westhaven-Moonstone’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
262 frost-free days in zone 9b. The last frost comes by Mar 8 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 30.
Months with highs of 62–84° and lows of 40° or more: June, July, August, September and October. 0.8 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Westhaven-Moonstone from natural hazards, tsunamis are the largest share (53%). Normals are averages; the hazards page covers the extremes.
Natural hazards →Westhaven-Moonstone and its neighbors
McKinleyville the hottest July afternoons (69°, 4° warmer). Differences under a degree are within what the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Westhaven-Moonstone’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 |
|---|---|---|---|---|
| Westhaven-Moonstone, CA | 41° | 65° | 54" | 0.0" |
| Coos Bay, OR | 40° | 66° | 61" | 0.2" |
| Sudden Valley, WA | 34° | 73° | 53" | 3.4" |
| Nantucket, MA | 26° | 76° | 44" | 25" |
| Makawao, HI | 53° | 75° | 23" | 0.0" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Westhaven-Moonstone averaged 1.6° warmer than the 1900s. The biggest change is in January (+2.7°).
A bigger shift than in 63% 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 Westhaven-Moonstone compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Westhaven-Moonstone’s place among California’s.
Westhaven-Moonstone weather by month
Highs, lows and precipitation from NOAA’s grid at Westhaven-Moonstone’s center; snow, wet days and snow on the ground from Eureka Wfo Woodley Island, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 54° | 41° | 8.6" | 0.0" | 17 | 0 | 43° – 53° |
| February | 55° | 41° | 7.4" | 0.0" | 15 | 0 | 44° – 53° |
| March | 56° | 43° | 7.7" | 0.0" | 16 | 0 | 46° – 53° |
| April | 57° | 44° | 4.9" | 0.0" | 14 | 0 | 47° – 56° |
| May | 60° | 47° | 2.6" | 0.0" | 9 | 0 | 50° – 57° |
| June | 63° | 49° | 1.1" | 0.0" | 6 | 0 | 52° – 60° |
| July | 65° | 52° | 0.2" | 0.0" | 3 | 0 | 55° – 61° |
| August | 65° | 52° | 0.2" | 0.0" | 4 | 0 | 56° – 62° |
| September | 65° | 50° | 0.9" | 0.0" | 5 | 0 | 55° – 61° |
| October | 62° | 47° | 3.4" | 0.0" | 9 | 0 | 51° – 59° |
| November | 57° | 43° | 6.5" | 0.0" | 14 | 0 | 44° – 54° |
| December | 54° | 41° | 10.5" | 0.0" | 17 | 0 | 43° – 53° |
| Year | 59° | 46° | 54.0" | 0.0" | 128 | 0 |
How much a month can swing
A normal is an average. January swings the most: from 1991 to 2020 its average ranged from 43° to 53°. July is the most reliable, staying within 5°.
Where Westhaven-Moonstone’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 Westhaven-Moonstone’s center.
- Snow: Eureka Wfo Woodley Island, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Arcata Eureka Airport, 4 miles from the town’s center, 310 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 Westhaven-Moonstone’s climate
What is the weather like in Westhaven-Moonstone?
A typical July afternoon reaches 65°, a January night drops to 41°, and snow is almost unheard of. Milder January nights than 90% of U.S. towns; cooler July afternoons than all but 20 U.S. towns.
How cold does it get in Westhaven-Moonstone in winter?
December nights average 41°. About 19 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 43°.
How much snow does Westhaven-Moonstone get?
About 0.0 inches in a normal winter at Eureka Wfo Woodley Island, CA, so most winters see none.
How hot does it get in Westhaven-Moonstone?
July, with a typical high of 65°. 90° days are rare: none in a normal year at Arcata Eureka Airport.
When is the first and last frost in Westhaven-Moonstone?
In half of years the last spring frost (32°) comes by March 8 and the first fall frost by November 30, about 262 frost-free days, at Arcata Eureka Airport.
What growing zone is Westhaven-Moonstone in?
Zone 9b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 27°.
What is the best time of year to visit Westhaven-Moonstone?
By one simple rule (highs of 62–84° and lows of 40° or more), June, July, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Westhaven-Moonstone getting warmer?
Yes: 1991–2020 averaged 1.6° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 63% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Westhaven-Moonstone.
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.