Photo: Micha de Vries from Middelburg, Nederland · CC BY 2.0Hardly any U.S. towns collect less precipitation than Dubois: 11 inches a year
Nights in January average 10°. By July afternoons alone, it runs cooler than 95% of U.S. towns. Decade by decade the climate has edged up, 1.4° above 1901–2000. Central heating does most of its work from October to May, in months below 50° on average.
A year in Dubois at a glance
Each month’s typical high and low, and what it brings.
What stands out about Dubois’ climate
Compared with towns across the U.S., with Dubois’ place in Wyoming beside it.
What a year in Dubois feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
A freeze is possible in every month
About 224 nights a year fall to 32° or below, and 17 to 0° or below. Frost and day counts come from NOAA’s station at Dubois, WY, 0.6 miles from the town’s center, 120 ft lower.
The 2023 USDA map puts Dubois’ 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 55 inches of snow a winter
Snow, measured at Dubois, WY, falls mostly in April. Precipitation (rain plus melted snow) adds up to 11 inches a year; May is the wettest month and January the driest. Rain or snow falls on about 88 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Dubois
Nearly all of the work is heating: a normal year has almost no cooling days. Months averaging under 55° run from September through June.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Dubois, WY.
Living with Dubois’ climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 4b, and frost can come in any month. The longest frost-free stretch in half of years is about 74 days.
Months with highs of 62–84° and lows of 40° or more: July and August. 4.7 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Dubois from natural hazards, river flooding is the largest share (54%); heat waves, cold waves, winter storms and ice storms together are 2%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Dubois and similar climates
TownRatings has no climate map of the towns around Dubois yet.
Climates most like Dubois’, 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 |
|---|---|---|---|---|
| Dubois, WY | 10° | 79° | 11" | 55" |
| Minot, ND | 2° | 82° | 17" | 52" |
| Gunnison, CO | 0° | 82° | 12" | 50" |
| Evergreen, MT | 18° | 82° | 15" | 54" |
| Taos, NM | 11° | 84° | 13" | 28" |
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 Dubois averaged 1.4° warmer than the 1900s. The biggest change is in January (+4.2°).
A bigger shift than in 53% 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 Dubois compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Dubois’ place among Wyoming’s.
Dubois weather by month
Highs, lows and precipitation from NOAA’s grid at Dubois’ center; snow, wet days and snow on the ground from Dubois, WY. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 34° | 10° | 0.4" | 4.8" | 5 | 12 | 16° – 29° |
| February | 36° | 9° | 0.5" | 8.1" | 7 | 12 | 18° – 31° |
| March | 44° | 17° | 0.6" | 8.2" | 7 | 8 | 24° – 36° |
| April | 50° | 23° | 1.1" | 9.9" | 9 | 5 | 32° – 42° |
| May | 60° | 31° | 1.9" | 4.0" | 11 | 2 | 39° – 49° |
| June | 70° | 37° | 1.5" | 0.6" | 9 | 0 | 48° – 59° |
| July | 79° | 42° | 1.0" | 0.0" | 7 | 0 | 52° – 65° |
| August | 77° | 40° | 0.9" | 0.0" | 8 | 0 | 55° – 62° |
| September | 68° | 34° | 1.2" | 0.8" | 7 | 0 | 47° – 54° |
| October | 55° | 25° | 0.9" | 4.8" | 7 | 2 | 32° – 46° |
| November | 42° | 16° | 0.6" | 7.6" | 7 | 9 | 21° – 37° |
| December | 33° | 9° | 0.5" | 6.5" | 6 | 14 | 15° – 25° |
| Year | 54° | 24° | 11.1" | 55.3" | 88 | 65 |
How much a month can swing
A normal is an average. November swings the most: from 1991 to 2020 its average ranged from 21° to 37°. September is the most reliable, staying within 7°.
Where Dubois’ 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 Dubois’ center.
- Snow: Dubois, WY (NOAA station in town).
- Frost, freezing nights, 90° and 100° days, heating and cooling: Dubois, WY, 0.6 miles from the town’s center, 120 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 Dubois’ climate
What is the weather like in Dubois?
A typical July afternoon reaches 79°, a January night drops to 10°, and about 55 inches of snow falls in a normal winter. Colder January nights than 94% of U.S. towns; cooler July afternoons than 95% of U.S. towns.
How cold does it get in Dubois in winter?
December nights average 9°. About 224 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 Dubois get?
About 55 inches in a normal winter at Dubois, WY, most of it in April, with snow on the ground about 65 days a year.
How hot does it get in Dubois?
July, with a typical high of 79° and a low of 42°. About 1 days a year reach 90° (Dubois, WY).
When is the first and last frost in Dubois?
There is no reliable frost-free season: at Dubois, WY, every month has nights at 32° or below, about 224 a year. In half of years the longest stretch without a freeze is about 74 days.
What growing zone is Dubois 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 Dubois?
By one simple rule (highs of 62–84° and lows of 40° or more), July and August. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Dubois getting warmer?
Yes: 1991–2020 averaged 1.4° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 53% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Dubois.
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.