Radersburg sits near the bottom of U.S. towns for precipitation, with 11 inches a year
In July the day’s top temperature is typically 84°. Winter nights are cold: in January they are colder than in 86% of U.S. towns. The latest 30-year average runs 1.3° warmer than 1901–2000’s, with January up the most. Homes need heating from October to April, the months averaging under 50°.
A year in Radersburg at a glance
Each month’s typical high and low, and what it brings.
What stands out about Radersburg’s climate
Compared with towns across the U.S., with Radersburg’s place in Montana beside it.
What a year in Radersburg feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 122 frost-free days a year
In half of years the last 32° night comes by May 19 and the first by September 19. Frost and day counts come from NOAA’s station at Townsend 3se, MT, 11 miles from the town’s center, 380 ft lower.
The 2023 USDA map puts Radersburg’s center in zone 5a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −20°. 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 24 inches of snow a winter
Snow, measured at Townsend 3se, MT, falls mostly in January, March and December. Precipitation (rain plus melted snow) adds up to 11 inches a year; June is the wettest month and February the driest. Rain or snow falls on about 83 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Radersburg
97% 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 Townsend 3se, MT.
Living with Radersburg’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
122 frost-free days in zone 5a. The last frost comes by May 19 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 19.
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 Radersburg from natural hazards, river flooding is the largest share (36%); heat waves, cold waves, winter storms and ice storms together are 19%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Radersburg and similar climates
TownRatings has no climate map of the towns around Radersburg yet.
Climates most like Radersburg’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 |
|---|---|---|---|---|
| Radersburg, MT | 15° | 84° | 11" | 24" |
| Taos, NM | 11° | 84° | 13" | 28" |
| Cody, WY | 14° | 85° | 11" | 45" |
| Shelley, ID | 14° | 87° | 11" | 15" |
| Salida, CO | 10° | 85° | 8" | 37" |
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 Radersburg averaged 1.3° warmer than the 1900s. The biggest change is in January (+3.9°).
A smaller shift than in 55% 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 Radersburg compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Radersburg’s place among Montana’s.
Radersburg weather by month
Highs, lows and precipitation from NOAA’s grid at Radersburg’s center; snow, wet days and snow on the ground from Townsend 3se, MT. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 35° | 15° | 0.3" | 4.4" | 5 | 15 | 15° – 33° |
| February | 37° | 16° | 0.3" | 3.2" | 5 | 8 | 10° – 36° |
| March | 47° | 23° | 0.5" | 4.0" | 5 | 4 | 25° – 42° |
| April | 55° | 30° | 1.1" | 2.3" | 8 | 0 | 38° – 47° |
| May | 65° | 39° | 1.7" | 0.1" | 11 | 0 | 47° – 56° |
| June | 73° | 46° | 2.4" | 0.0" | 12 | 0 | 54° – 66° |
| July | 84° | 51° | 1.2" | 0.0" | 9 | 0 | 57° – 75° |
| August | 83° | 49° | 1.0" | 0.0" | 8 | 0 | 59° – 70° |
| September | 72° | 41° | 0.9" | 0.0" | 6 | 0 | 53° – 61° |
| October | 57° | 32° | 0.6" | 1.4" | 5 | 1 | 36° – 50° |
| November | 43° | 22° | 0.4" | 3.9" | 5 | 6 | 23° – 41° |
| December | 34° | 14° | 0.3" | 4.4" | 5 | 13 | 15° – 30° |
| Year | 57° | 32° | 10.6" | 23.7" | 83 | 45 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 10° to 36°. May is the most reliable, staying within 9°.
Where Radersburg’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 Radersburg’s center.
- Snow: Townsend 3se, MT.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Townsend 3se, MT, 11 miles from the town’s center, 380 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 Radersburg’s climate
What is the weather like in Radersburg?
A typical July afternoon reaches 84°, a January night drops to 15°, and about 24 inches of snow falls in a normal winter. Colder January nights than 86% of U.S. towns; cooler July afternoons than 65% of U.S. towns.
How cold does it get in Radersburg in winter?
December nights average 14°. About 174 nights a year reach 32° or below and 17 reach 0° or below. In the coldest December of the last 30 years the month averaged 15°.
How much snow does Radersburg get?
About 24 inches in a normal winter at Townsend 3se, MT, most of it in January, March and December, with snow on the ground about 45 days a year.
How hot does it get in Radersburg?
July, with a typical high of 84° and a low of 51°. About 14 days a year reach 90° (Townsend 3se, MT).
When is the first and last frost in Radersburg?
In half of years the last spring frost (32°) comes by May 19 and the first fall frost by September 19, about 122 frost-free days, at Townsend 3se, MT.
What growing zone is Radersburg in?
Zone 5a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −20°.
What is the best time of year to visit Radersburg?
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 Radersburg getting warmer?
Yes: 1991–2020 averaged 1.3° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 55% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Radersburg.
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.