Westwood gets about 109 inches of snow a winter, more than 98% of U.S. towns
A typical July afternoon reaches 84°, a January night drops to 23°, and about 109 inches of snow falls in a normal winter.
A year in Westwood at a glance
Each month’s typical high and low, and what it brings.
What stands out about Westwood’s climate
Compared with towns across the U.S., with Westwood’s place in California beside it.
What a year in Westwood feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 143 frost-free days a year
In half of years the last 32° night comes by May 18 and the first by October 8. Frost and day counts come from Canyon Dam, CA, 10 miles away.
The 2023 USDA map puts Westwood’s center in zone 6b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −2°. 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 109 inches of snow a winter
Snow, measured at Canyon Dam, CA, falls mostly in January. Precipitation (rain plus melted snow) adds up to 39 inches a year; December is the wettest month and August the driest. Rain or snow falls on about 81 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Westwood
96% 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 Canyon Dam, CA.
Living with Westwood’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
143 frost-free days in zone 6b. The last frost comes by May 18 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: June, July, August and September. 8.5 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Westwood from natural hazards, river flooding is the largest share (56%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Westwood and similar climates
TownRatings has no climate map of the towns around Westwood yet.
Climates most like Westwood’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 |
|---|---|---|---|---|
| Westwood, CA | 23° | 84° | 39" | 109" |
| Allegan, MI | 18° | 83° | 39" | 109" |
| Richmond Heights, OH | 21° | 82° | 41" | 114" |
| Amherst, NY | 18° | 81° | 38" | 95" |
| Erie, PA | 20° | 81° | 44" | 104" |
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 Westwood averaged 1.3° warmer than the 1900s. The biggest change is in January (+2.5°).
A smaller shift than in 58% 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 Westwood compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Westwood’s place among California’s.
Westwood weather by month
Highs, lows and precipitation from NOAA’s grid at Westwood’s center; snow, wet days and snow on the ground from Canyon Dam, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 42° | 23° | 6.8" | 28.5" | 11 | 22 | 25° – 39° |
| February | 45° | 25° | 6.0" | 22.3" | 11 | 20 | 28° – 42° |
| March | 50° | 28° | 5.6" | 17.1" | 11 | 19 | 30° – 46° |
| April | 55° | 31° | 3.1" | 7.3" | 9 | 5 | 36° – 47° |
| May | 65° | 38° | 2.3" | 0.5" | 7 | 0 | 42° – 58° |
| June | 75° | 44° | 1.0" | 0.1" | 3 | 0 | 54° – 66° |
| July | 84° | 50° | 0.2" | 0.0" | 1 | 0 | 61° – 71° |
| August | 83° | 48° | 0.2" | 0.0" | 1 | 0 | 62° – 70° |
| September | 77° | 42° | 0.4" | 0.0" | 2 | 0 | 56° – 63° |
| October | 64° | 34° | 2.0" | 0.8" | 5 | 0 | 45° – 55° |
| November | 50° | 28° | 3.8" | 7.1" | 8 | 4 | 30° – 44° |
| December | 41° | 23° | 7.4" | 25.6" | 12 | 18 | 27° – 35° |
| Year | 61° | 34° | 38.7" | 109.3" | 81 | 88 |
How much a month can swing
A normal is an average. May swings the most: from 1991 to 2020 its average ranged from 42° to 58°. September is the most reliable, staying within 8°.
Where Westwood’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 Westwood’s center.
- Snow: Canyon Dam, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Canyon Dam, CA, 10 miles from the town’s center, 540 ft lower; no station nearby passes every check; this is the nearest one in the same valley, flagged above.
- 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 Westwood’s climate
What is the weather like in Westwood?
A typical July afternoon reaches 84°, a January night drops to 23°, and about 109 inches of snow falls in a normal winter. Milder January nights than 55% of U.S. towns; cooler July afternoons than 60% of U.S. towns.
How cold does it get in Westwood in winter?
December nights average 23°. About 159 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 27°.
How much snow does Westwood get?
About 109 inches in a normal winter at Canyon Dam, CA, most of it in January, with snow on the ground about 88 days a year.
How hot does it get in Westwood?
July, with a typical high of 84° and a low of 50°. About 18 days a year reach 90° (Canyon Dam, CA).
When is the first and last frost in Westwood?
In half of years the last spring frost (32°) comes by May 18 and the first fall frost by October 8, about 143 frost-free days, at Canyon Dam, CA.
What growing zone is Westwood in?
Zone 6b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −2°.
What is the best time of year to visit Westwood?
By one simple rule (highs of 62–84° and lows of 40° or more), June, July, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Westwood getting warmer?
Yes: 1991–2020 averaged 1.3° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 58% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Westwood.
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.