Photo: J.B. Chandler · CC BY-SA 3.0Midwinter lows in Broadus sink below those of 93% of U.S. towns
Midsummer highs settle at about 90°. By precipitation alone, it ranks drier than 93% of U.S. towns. January has warmed most since 1901–2000, part of a 1.4° rise. Central heating does most of its work from October to April, in months below 50° on average.
A year in Broadus at a glance
Each month’s typical high and low, and what it brings.
What stands out about Broadus’ climate
Compared with towns across the U.S., with Broadus’ place in Montana beside it.
What a year in Broadus feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 135 frost-free days a year
In half of years the last 32° night comes by May 16 and the first by September 28. Frost and day counts come from NOAA’s station at Broadus, MT, 0.1 miles from the town’s center, at about the same height.
The 2023 USDA map puts Broadus’ center in zone 4b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −22°. 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 15 inches of rain a year
May is the wettest month and January the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Broadus
90% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Broadus, MT.
Living with Broadus’ climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
135 frost-free days in zone 4b. The last frost comes by May 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 Sep 28.
Months with highs of 62–84° and lows of 40° or more: May, June and September. 0.1 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Broadus from natural hazards, river flooding is the largest share (38%); heat waves, cold waves, winter storms and ice storms together are 19%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Broadus and similar climates
TownRatings has no climate map of the towns around Broadus 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 Broadus averaged 1.4° warmer than the 1900s. The biggest change is in January (+4.1°).
A bigger shift than in 52% 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 Broadus compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Broadus’ place among Montana’s.
Broadus weather by month
Highs, lows and precipitation from NOAA’s grid at Broadus’ center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 35° | 10° | 0.4" | 13° – 34° |
| February | 38° | 13° | 0.5" | 7° – 36° |
| March | 50° | 23° | 0.8" | 25° – 47° |
| April | 59° | 31° | 1.7" | 38° – 50° |
| May | 69° | 41° | 2.8" | 50° – 61° |
| June | 80° | 51° | 2.4" | 59° – 72° |
| July | 90° | 57° | 1.8" | 65° – 79° |
| August | 88° | 55° | 1.1" | 65° – 77° |
| September | 77° | 44° | 1.2" | 55° – 67° |
| October | 61° | 32° | 1.2" | 39° – 52° |
| November | 46° | 21° | 0.4" | 22° – 43° |
| December | 35° | 12° | 0.4" | 13° – 31° |
| Year | 61° | 32° | 14.7" |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 7° to 36°. May is the most reliable, staying within 11°.
Where Broadus’ 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 Broadus’ center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Broadus, MT, 0.1 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 Broadus’ climate
What is the weather like in Broadus?
A typical July afternoon reaches 90°, a January night drops to 10°. Colder January nights than 93% of U.S. towns; hotter July afternoons than 76% of U.S. towns.
How cold does it get in Broadus in winter?
January nights average 10°. About 172 nights a year reach 32° or below and 19 reach 0° or below. In the coldest January of the last 30 years the month averaged 13°.
How hot does it get in Broadus?
July, with a typical high of 90° and a low of 57°. About 45 days a year reach 90° and 6 reach 100° (Broadus, MT).
When is the first and last frost in Broadus?
In half of years the last spring frost (32°) comes by May 16 and the first fall frost by September 28, about 135 frost-free days, at Broadus, MT.
What growing zone is Broadus in?
Zone 4b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −22°.
What is the best time of year to visit Broadus?
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 Broadus getting warmer?
Yes: 1991–2020 averaged 1.4° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 52% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Broadus.
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.