Photo: 25or6to4 · CC BY-SA 4.0Few U.S. towns get less rain and snow than Fromberg: 13 inches a year
On a normal July day the thermometer tops out near 88°. The year swings widely: the coldest month’s nights and the warmest month’s afternoons are 74° apart. In January, nights here are colder than in 88% of U.S. towns. For walks and days out, May, June and September bring highs of 68–78°.
A year in Fromberg at a glance
Each month’s typical high and low, and what it brings.
What stands out about Fromberg’s climate
Compared with towns across the U.S., with Fromberg’s place in Montana beside it.
What a year in Fromberg feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 107 frost-free days a year
In half of years the last 32° night comes by May 29 and the first by September 15. Frost and day counts come from NOAA’s station at Joliet, MT, 8 miles from the town’s center, 310 ft higher.
The 2023 USDA map puts Fromberg’s center in zone 5a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −19°. 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 30 inches of snow a winter
Snow, measured at Bridger 2 N, MT, falls mostly in December. Precipitation (rain plus melted snow) adds up to 13 inches a year; May is the wettest month and January the driest. Rain or snow falls on about 54 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Fromberg
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 Joliet, MT.
Living with Fromberg’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
107 frost-free days in zone 5a. The last frost comes by May 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 Sep 15.
Months with highs of 62–84° and lows of 40° or more: May, June and September.
Parks & trails →Of the yearly building losses FEMA expects in Fromberg from natural hazards, river flooding is the largest share (75%); heat waves, cold waves, winter storms and ice storms together are 11%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Fromberg and similar climates
TownRatings has no climate map of the towns around Fromberg yet.
Climates most like Fromberg’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 |
|---|---|---|---|---|
| Fromberg, MT | 14° | 88° | 13" | 30" |
| Wellington, CO | 16° | 88° | 14" | 34" |
| Gallup, NM | 17° | 88° | 10" | 34" |
| Spring Creek, NV | 15° | 89° | 14" | 41" |
| Chubbuck, ID | 17° | 88° | 12" | 39" |
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 Fromberg averaged 1.6° warmer than the 1900s. The biggest change is in January (+4.5°).
A bigger shift than in 64% 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 Fromberg compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Fromberg’s place among Montana’s.
Fromberg weather by month
Highs, lows and precipitation from NOAA’s grid at Fromberg’s center; snow, wet days and snow on the ground from Bridger 2 N, MT. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 36° | 14° | 0.4" | 5.1" | 2 | 16° – 35° |
| February | 40° | 16° | 0.4" | 4.5" | 2 | 11° – 38° |
| March | 51° | 24° | 0.7" | 3.1" | 3 | 27° – 45° |
| April | 59° | 31° | 1.6" | 3.5" | 6 | 39° – 50° |
| May | 68° | 40° | 2.3" | 0.7" | 8 | 50° – 59° |
| June | 78° | 48° | 2.0" | 0.0" | 8 | 57° – 69° |
| July | 88° | 55° | 1.0" | 0.0" | 4 | 61° – 77° |
| August | 86° | 52° | 0.7" | 0.0" | 5 | 63° – 74° |
| September | 75° | 43° | 1.2" | 0.0" | 5 | 55° – 66° |
| October | 60° | 33° | 1.3" | 2.0" | 5 | 38° – 53° |
| November | 47° | 23° | 0.6" | 4.7" | 3 | 25° – 44° |
| December | 37° | 15° | 0.4" | 6.7" | 3 | 16° – 32° |
| Year | 61° | 33° | 12.6" | 30.3" | 54 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 11° to 38°. May is the most reliable, staying within 9°.
Where Fromberg’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 Fromberg’s center.
- Snow: Bridger 2 N, MT.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Joliet, MT, 8 miles from the town’s center, 310 ft higher; 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 Fromberg’s climate
What is the weather like in Fromberg?
A typical July afternoon reaches 88°, a January night drops to 14°, and about 30 inches of snow falls in a normal winter. Colder January nights than 88% of U.S. towns; hotter July afternoons than 67% of U.S. towns.
How cold does it get in Fromberg in winter?
January nights average 14°. About 185 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 16°.
How much snow does Fromberg get?
About 30 inches in a normal winter at Bridger 2 N, MT, most of it in December.
How hot does it get in Fromberg?
July, with a typical high of 88° and a low of 55°. About 29 days a year reach 90° and 2 reach 100° (Joliet, MT).
When is the first and last frost in Fromberg?
In half of years the last spring frost (32°) comes by May 29 and the first fall frost by September 15, about 107 frost-free days, at Joliet, MT.
What growing zone is Fromberg in?
Zone 5a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −19°.
What is the best time of year to visit Fromberg?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Fromberg getting warmer?
Yes: 1991–2020 averaged 1.6° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 64% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Fromberg.
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.