Photo: Ellin Beltz · Public domainKlamath’s winters are milder and less snowy than most of the U.S.
A typical July afternoon reaches 66°, a January night drops to 40°, and snow is almost unheard of.
A year in Klamath at a glance
Each month’s typical high and low, and what it brings.
What stands out about Klamath’s climate
Compared with towns across the U.S., with Klamath’s place in California beside it.
What a year in Klamath feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 252 frost-free days a year
In half of years the last 32° night comes by March 16 and the first by November 20. Frost and day counts come from NOAA’s station at Klamath, CA, 1.1 miles from the town’s center, 340 ft lower.
The 2023 USDA map puts Klamath’s center in zone 9b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 26°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
About 69 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 Klamath, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Klamath
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 Klamath, CA.
Living with Klamath’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
252 frost-free days in zone 9b. The last frost comes by Mar 16 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 20.
Months with highs of 62–84° and lows of 40° or more: June, July, August, September and October. 21 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Klamath from natural hazards, tsunamis are the largest share (69%). Normals are averages; the hazards page covers the extremes.
Natural hazards →Klamath and similar climates
TownRatings has no climate map of the towns around Klamath yet.
Climates most like Klamath’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 |
|---|---|---|---|---|
| Klamath, CA | 40° | 66° | 69" | 0.0" |
| Florence, OR | 40° | 66° | 73" | 0.6" |
| Aberdeen, WA | 37° | 68° | 80" | 0.5" |
| Kodiak, AK | 26° | 62° | 78" | 70" |
| Boone, NC | 24° | 79° | 58" | 26" |
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 Klamath averaged 1.9° warmer than the 1900s. The biggest change is in January (+3.1°).
A bigger shift than in 83% 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 Klamath compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Klamath’s place among California’s.
Klamath weather by month
Highs, lows and precipitation from NOAA’s grid at Klamath’s center; snow, wet days and snow on the ground from Klamath, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 53° | 40° | 11.6" | 0.0" | 18 | 0 | 42° – 52° |
| February | 55° | 40° | 8.8" | 0.0" | 17 | 0 | 40° – 52° |
| March | 56° | 42° | 9.2" | 0.0" | 16 | 0 | 46° – 54° |
| April | 58° | 43° | 6.2" | 0.0" | 16 | 0 | 47° – 55° |
| May | 61° | 47° | 3.3" | 0.0" | 10 | 0 | 50° – 57° |
| June | 64° | 50° | 1.4" | 0.0" | 5 | 0 | 53° – 64° |
| July | 66° | 52° | 0.2" | 0.0" | 2 | 0 | 55° – 63° |
| August | 66° | 53° | 0.3" | 0.0" | 2 | 0 | 57° – 63° |
| September | 66° | 50° | 1.1" | 0.0" | 3 | 0 | 54° – 61° |
| October | 63° | 46° | 4.5" | 0.0" | 7 | 0 | 52° – 59° |
| November | 57° | 43° | 8.9" | 0.0" | 16 | 0 | 44° – 53° |
| December | 53° | 40° | 13.9" | 0.0" | 18 | 0 | 43° – 50° |
| Year | 60° | 46° | 69.4" | 0.0" | 128 | 0 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 40° to 52°. August is the most reliable, staying within 6°.
Where Klamath’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 Klamath’s center.
- Snow: Klamath, CA (NOAA station in town).
- Frost, freezing nights, 90° and 100° days, heating and cooling: Klamath, CA, 1.1 miles from the town’s center, 340 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 Klamath’s climate
What is the weather like in Klamath?
A typical July afternoon reaches 66°, a January night drops to 40°, and snow is almost unheard of. Milder January nights than 89% of U.S. towns; cooler July afternoons than all but 30 U.S. towns.
How cold does it get in Klamath in winter?
December nights average 40°. About 26 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 43°.
How much snow does Klamath get?
About 0.0 inches in a normal winter at Klamath, CA, so most winters see none.
How hot does it get in Klamath?
July, with a typical high of 66°. 90° days are rare: none in a normal year at Klamath, CA.
When is the first and last frost in Klamath?
In half of years the last spring frost (32°) comes by March 16 and the first fall frost by November 20, about 252 frost-free days, at Klamath, CA.
What growing zone is Klamath in?
Zone 9b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 26°.
What is the best time of year to visit Klamath?
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 Klamath getting warmer?
Yes: 1991–2020 averaged 1.9° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 83% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Klamath.
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.