Less rain and snow falls on Geyser than on 92% of U.S. towns: 17 inches a year
Nights in January average 13°. Winter nights are cold: in January they are colder than in 89% of U.S. towns. The latest 30-year average runs 1.2° warmer than 1901–2000’s, with January up the most. Warm coats and heating bills mark the months from October to April, when means dip under 50°.
A year in Geyser at a glance
Each month’s typical high and low, and what it brings.
What stands out about Geyser’s climate
Compared with towns across the U.S., with Geyser’s place in Montana beside it.
What a year in Geyser feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 123 frost-free days a year
In half of years the last 32° night comes by May 22 and the first by September 23. Frost and day counts come from NOAA’s station at Raynesford 2 Nnw, MT, 12 miles from the town’s center, at about the same height.
The 2023 USDA map puts Geyser’s center in zone 4b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −23°. 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 17 inches of rain a year
June is the wettest month and February the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Geyser
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 Raynesford 2 Nnw, MT.
Living with Geyser’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
123 frost-free days in zone 4b. The last frost comes by May 22 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Sep 23.
Months with highs of 62–84° and lows of 40° or more: June, July, August and September.
Parks & trails →Of the yearly building losses FEMA expects in Geyser from natural hazards, river flooding is the largest share (49%); heat waves, cold waves, winter storms and ice storms together are 39%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Geyser and similar climates
TownRatings has no climate map of the towns around Geyser yet.
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 Geyser averaged 1.2° warmer than the 1900s. The biggest change is in January (+4.5°).
A smaller shift than in 65% 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 Geyser compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Geyser’s place among Montana’s.
Geyser weather by month
Highs, lows and precipitation from NOAA’s grid at Geyser’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 36° | 13° | 0.6" | 13° – 35° |
| February | 38° | 15° | 0.6" | 3° – 38° |
| March | 45° | 22° | 0.9" | 18° – 41° |
| April | 53° | 29° | 1.7" | 35° – 46° |
| May | 63° | 38° | 2.8" | 45° – 55° |
| June | 71° | 45° | 3.1" | 55° – 62° |
| July | 82° | 50° | 1.5" | 56° – 74° |
| August | 82° | 49° | 1.5" | 59° – 70° |
| September | 71° | 41° | 1.6" | 51° – 62° |
| October | 57° | 31° | 1.3" | 35° – 49° |
| November | 44° | 22° | 0.6" | 23° – 43° |
| December | 36° | 15° | 0.6" | 14° – 34° |
| Year | 57° | 31° | 16.7" |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 3° to 38°. June is the most reliable, staying within 8°.
Where Geyser’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 Geyser’s center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Raynesford 2 Nnw, MT, 12 miles from the town’s center, at about the same height; 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 Geyser’s climate
What is the weather like in Geyser?
A typical July afternoon reaches 82°, a January night drops to 13°. Colder January nights than 89% of U.S. towns; cooler July afternoons than 83% of U.S. towns.
How cold does it get in Geyser in winter?
January nights average 13°. About 165 nights a year reach 32° or below and 18 reach 0° or below. In the coldest January of the last 30 years the month averaged 13°.
How hot does it get in Geyser?
July, with a typical high of 82° and a low of 50°. About 14 days a year reach 90° (Raynesford 2 Nnw, MT).
When is the first and last frost in Geyser?
In half of years the last spring frost (32°) comes by May 22 and the first fall frost by September 23, about 123 frost-free days, at Raynesford 2 Nnw, MT.
What growing zone is Geyser in?
Zone 4b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −23°.
What is the best time of year to visit Geyser?
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 Geyser getting warmer?
Yes: 1991–2020 averaged 1.2° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 65% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Geyser.
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.