Photo: Frank Schulenburg · CC BY-SA 4.0Bangor reaches 100° on about 19 days a year, more than 95% of U.S. towns
A typical July afternoon reaches 95°, a January night drops to 39°, and snow is almost unheard of.
A year in Bangor at a glance
Each month’s typical high and low, and what it brings.
What stands out about Bangor’s climate
Compared with towns across the U.S., with Bangor’s place in California beside it.
What a year in Bangor feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 317 frost-free days a year
In half of years the last 32° night comes by January 29 and the first by December 7. Frost and day counts come from NOAA’s station at Oroville Muni Airport, 14 miles from the town’s center, 490 ft lower.
The 2023 USDA map puts Bangor’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 35 inches of rain a year
December is the wettest month and July the driest. Rain falls on about 75 days a year. Snow is rare: about 0.0" in a normal year at Colgate Powerhouse, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Bangor
58% of the work is heating. Months averaging under 55° run from November through March.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Oroville Muni Airport.
Living with Bangor’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
317 frost-free days in zone 9b. The last frost comes by Jan 29 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 7.
Months with highs of 62–84° and lows of 40° or more: March, April, May, October and November.
Parks & trails →Of the yearly building losses FEMA expects in Bangor from natural hazards, drought is the largest share (36%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Bangor and its neighbors
Every town next door is within a degree of Bangor in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Bangor’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 |
|---|---|---|---|---|
| Bangor, CA | 39° | 95° | 35" | 0.0" |
| Canyon Lake, TX | 39° | 95° | 35" | 0.0" |
| Lone Grove, OK | 31° | 94° | 39" | 2.7" |
| Dublin, GA | 37° | 93° | 47" | 0.0" |
| Grants Pass, OR | 34° | 90° | 33" | 0.9" |
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 Bangor averaged 1.2° warmer than the 1900s. The biggest change is in January (+2.3°).
A smaller 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 Bangor compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Bangor’s place among California’s.
Bangor weather by month
Highs, lows and precipitation from NOAA’s grid at Bangor’s center; snow, wet days and snow on the ground from Colgate Powerhouse, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 56° | 39° | 6.2" | 0.0" | 12 | 0 | 44° – 54° |
| February | 61° | 41° | 6.2" | 0.0" | 11 | 0 | 45° – 56° |
| March | 65° | 44° | 5.3" | 0.0" | 11 | 0 | 48° – 61° |
| April | 70° | 47° | 2.7" | 0.0" | 8 | 0 | 53° – 63° |
| May | 79° | 53° | 1.5" | 0.0" | 5 | 0 | 56° – 74° |
| June | 88° | 59° | 0.6" | 0.0" | 2 | 0 | 68° – 79° |
| July | 95° | 64° | 0.0" | 0.0" | 0 | 0 | 75° – 83° |
| August | 94° | 62° | 0.1" | 0.0" | 1 | 0 | 75° – 82° |
| September | 89° | 58° | 0.3" | 0.0" | 2 | 0 | 69° – 78° |
| October | 78° | 51° | 1.8" | 0.0" | 4 | 0 | 60° – 70° |
| November | 64° | 44° | 3.6" | 0.0" | 8 | 0 | 46° – 60° |
| December | 56° | 39° | 6.5" | 0.0" | 12 | 0 | 43° – 51° |
| Year | 75° | 50° | 34.8" | 0.0" | 75 | 0 |
How much a month can swing
A normal is an average. May swings the most: from 1991 to 2020 its average ranged from 56° to 74°. August is the most reliable, staying within 7°.
Where Bangor’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 Bangor’s center.
- Snow: Colgate Powerhouse, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Oroville Muni Airport, 14 miles from the town’s center, 490 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 Bangor’s climate
What is the weather like in Bangor?
A typical July afternoon reaches 95°, a January night drops to 39°, and snow is almost unheard of. Milder January nights than 87% of U.S. towns; hotter July afternoons than 95% of U.S. towns.
How cold does it get in Bangor in winter?
December nights average 39°. About 11 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 43°.
How much snow does Bangor get?
About 0.0 inches in a normal winter at Colgate Powerhouse, CA, so most winters see none.
How hot does it get in Bangor?
July, with a typical high of 95° and a low of 64°. About 93 days a year reach 90° and 19 reach 100° (Oroville Muni Airport).
When is the first and last frost in Bangor?
In half of years the last spring frost (32°) comes by January 29 and the first fall frost by December 7, about 317 frost-free days, at Oroville Muni Airport.
What growing zone is Bangor 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 Bangor?
By one simple rule (highs of 62–84° and lows of 40° or more), March, April, May, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Bangor getting warmer?
Yes: 1991–2020 averaged 1.2° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 63% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Bangor.
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.