Con Creek School · Photo: Frank Schulenburg · CC BY-SA 3.0Boonville has milder winter nights than 86% of U.S. towns
Sunny July days climb to about 86°. It is a dry place: less rain and snow fall here than on 62% of U.S. towns. The latest 30-year average runs 1.0° warmer than 1901–2000’s, with January up the most. Picnics, hikes and garden evenings come into their own from March to June and September to November, with highs of 63–83°.
A year in Boonville at a glance
Each month’s typical high and low, and what it brings.
What stands out about Boonville’s climate
Compared with towns across the U.S., with Boonville’s place in California beside it.
What a year in Boonville feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 279 frost-free days a year
In half of years the last 32° night comes by February 25 and the first by December 3. Frost and day counts come from Cloverdale, CA, 24 miles away.
The 2023 USDA map puts Boonville’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°
90° days by month
Average days at 90° or more
About 3 inches of snow a winter
Snow, measured at Ukiah 4 Wsw, CA, falls mostly in February. Precipitation (rain plus melted snow) adds up to 40 inches a year; December is the wettest month and July the driest. Rain or snow falls on about 99 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Boonville
66% of the work is heating. Months averaging under 55° run from November 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 Cloverdale, CA.
Living with Boonville’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
279 frost-free days in zone 9b. The last frost comes by Feb 25 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Dec 3.
Months with highs of 62–84° and lows of 40° or more: March, April, May, June, September, October and November. 2.0 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Boonville from natural hazards, river flooding is the largest share (52%). Normals are averages; the hazards page covers the extremes.
Natural hazards →Boonville and similar climates
TownRatings has no climate map of the towns around Boonville yet.
Climates most like Boonville’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 |
|---|---|---|---|---|
| Boonville, CA | 39° | 86° | 40" | 2.5" |
| Sutherlin, OR | 36° | 85° | 41" | 0.6" |
| Kill Devil Hills, NC | 35° | 86° | 50" | 1.1" |
| Virginia Beach, VA | 32° | 87° | 48" | 3.4" |
| Ocean City, MD | 30° | 86° | 46" | 10" |
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 Boonville averaged 0.9° warmer than the 1900s. The biggest change is in January (+1.6°).
A smaller shift than in 81% 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 Boonville compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Boonville’s place among California’s.
Boonville weather by month
Highs, lows and precipitation from NOAA’s grid at Boonville’s center; snow, wet days and snow on the ground from Ukiah 4 Wsw, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 57° | 39° | 7.8" | 0.3" | 17 | 0 | 44° – 53° |
| February | 59° | 39° | 7.1" | 1.2" | 15 | 0 | 44° – 55° |
| March | 63° | 40° | 6.0" | 0.6" | 14 | 0 | 45° – 58° |
| April | 66° | 42° | 2.6" | 0.0" | 11 | 0 | 49° – 59° |
| May | 72° | 46° | 1.2" | 0.0" | 7 | 0 | 53° – 65° |
| June | 79° | 50° | 0.4" | 0.0" | 2 | 0 | 60° – 70° |
| July | 86° | 53° | 0.0" | 0.0" | 0 | 0 | 66° – 73° |
| August | 86° | 53° | 0.1" | 0.0" | 0 | 0 | 67° – 73° |
| September | 83° | 50° | 0.2" | 0.0" | 1 | 0 | 63° – 71° |
| October | 75° | 46° | 1.8" | 0.0" | 5 | 0 | 56° – 67° |
| November | 63° | 41° | 4.1" | 0.1" | 11 | 0 | 44° – 56° |
| December | 56° | 38° | 8.5" | 0.3" | 16 | 0 | 44° – 51° |
| Year | 70° | 45° | 39.6" | 2.5" | 99 | 1 |
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 45° to 58°. August is the most reliable, staying within 7°.
Where Boonville’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 Boonville’s center.
- Snow: Ukiah 4 Wsw, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Cloverdale, CA, 24 miles from the town’s center, at about the same height; 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 Boonville’s climate
What is the weather like in Boonville?
A typical July afternoon reaches 86°, a January night drops to 39°, and about 3 inches of snow falls in a normal winter. Milder January nights than 86% of U.S. towns; hotter July afternoons than 55% of U.S. towns.
How cold does it get in Boonville in winter?
December nights average 38°. About 13 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 44°.
How much snow does Boonville get?
About 2.5 inches in a normal winter at Ukiah 4 Wsw, CA, most of it in February, with snow on the ground about 1 days a year.
How hot does it get in Boonville?
July, with a typical high of 86° and a low of 53°. About 84 days a year reach 90° and 21 reach 100° (Cloverdale, CA).
When is the first and last frost in Boonville?
In half of years the last spring frost (32°) comes by February 25 and the first fall frost by December 3, about 279 frost-free days, at Cloverdale, CA.
What growing zone is Boonville 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 Boonville?
By one simple rule (highs of 62–84° and lows of 40° or more), March, April, May, June, September, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Boonville getting warmer?
Yes: 1991–2020 averaged 1.0° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 81% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Boonville.
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.