Camp Disappointment · Photo: National Park Service · Public domainBlackfoot’s winters are colder than most of the U.S.; July afternoons average 78°
A typical July afternoon reaches 78°, a January night drops to 13°.
A year in Blackfoot at a glance
Each month’s typical high and low, and what it brings.
What stands out about Blackfoot’s climate
Compared with towns across the U.S., with Blackfoot’s place in Montana beside it.
What a year in Blackfoot feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 113 frost-free days a year
In half of years the last 32° night comes by May 24 and the first by September 15. Frost and day counts come from NOAA’s station at Cut Bank Muni Airport, 23 miles from the town’s center, 320 ft lower.
The 2023 USDA map puts Blackfoot’s center in zone 4a: 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°
90° days by month
Average days at 90° or more
About 14 inches of rain a year
June is the wettest month and January the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Blackfoot
98% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from September 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 Cut Bank Muni Airport.
Living with Blackfoot’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
113 frost-free days in zone 4a. The last frost comes by May 24 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 15.
Months with highs of 62–84° and lows of 40° or more: June, July and August.
Parks & trails →Cold waves are 41% of the yearly building losses FEMA expects in Blackfoot from natural hazards, the largest share. Normals are averages; the hazards page covers the extremes.
Natural hazards →Blackfoot and similar climates
TownRatings has no climate map of the towns around Blackfoot 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 Blackfoot averaged 1.8° warmer than the 1900s. The biggest change is in January (+5.2°).
A bigger shift than in 79% 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 Blackfoot compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Blackfoot’s place among Montana’s.
Blackfoot weather by month
Highs, lows and precipitation from NOAA’s grid at Blackfoot’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 32° | 13° | 0.7" | 10° – 32° |
| February | 33° | 13° | 0.7" | 0° – 35° |
| March | 41° | 20° | 0.8" | 15° – 38° |
| April | 50° | 28° | 1.1" | 33° – 45° |
| May | 60° | 36° | 2.0" | 43° – 53° |
| June | 68° | 43° | 2.8" | 53° – 61° |
| July | 78° | 48° | 1.1" | 54° – 72° |
| August | 77° | 46° | 1.1" | 56° – 66° |
| September | 67° | 40° | 1.2" | 50° – 59° |
| October | 53° | 30° | 1.0" | 34° – 48° |
| November | 39° | 21° | 0.8" | 20° – 40° |
| December | 32° | 14° | 0.7" | 12° – 32° |
| Year | 53° | 29° | 13.9" |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 0° to 35°. June is the most reliable, staying within 8°.
Where Blackfoot’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 Blackfoot’s center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Cut Bank Muni Airport, 23 miles from the town’s center, 320 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 Blackfoot’s climate
What is the weather like in Blackfoot?
A typical July afternoon reaches 78°, a January night drops to 13°. Colder January nights than 90% of U.S. towns; cooler July afternoons than 96% of U.S. towns.
How cold does it get in Blackfoot in winter?
January nights average 13°. About 186 nights a year reach 32° or below and 28 reach 0° or below. In the coldest January of the last 30 years the month averaged 10°.
How hot does it get in Blackfoot?
July, with a typical high of 78° and a low of 48°. About 9 days a year reach 90° (Cut Bank Muni Airport).
When is the first and last frost in Blackfoot?
In half of years the last spring frost (32°) comes by May 24 and the first fall frost by September 15, about 113 frost-free days, at Cut Bank Muni Airport.
What growing zone is Blackfoot in?
Zone 4a 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 Blackfoot?
By one simple rule (highs of 62–84° and lows of 40° or more), June, July and August. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Blackfoot getting warmer?
Yes: 1991–2020 averaged 1.8° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 79% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Blackfoot.
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.