DeBorgia Schoolhouse · Photo: Ltvine · CC BY-SA 3.0Dry weather: only 30 inches of rain and melted snow a year in De Borgia, less than in 86% of U.S. towns
Nights in January average 20°. November is the wettest month, July the driest. By July afternoons alone, it runs cooler than 83% of U.S. towns. Radiators earn their keep from October to April, the months that average under 50°.
A year in De Borgia at a glance
Each month’s typical high and low, and what it brings.
What stands out about De Borgia’s climate
Compared with towns across the U.S., with De Borgia’s place in Montana beside it.
What a year in De Borgia 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 215 nights a year fall to 32° or below, and 10 to 0° or below. Frost and day counts come from NOAA’s station at Haugan 1 W, MT, 5 miles from the town’s center, 260 ft lower.
The 2023 USDA map puts De Borgia’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −9°. 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 rain a year
November is the wettest month and July the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in De Borgia
99% 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 Haugan 1 W, MT.
Living with De Borgia’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 6a, and frost can come in any month. The longest frost-free stretch in half of years is about 90 days.
Months with highs of 62–84° and lows of 40° or more: June, July and August. 7.3 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in De Borgia from natural hazards, river flooding is the largest share (48%); heat waves, cold waves, winter storms and ice storms together are 11%. Normals are averages; the hazards page covers the extremes.
Natural hazards →De Borgia and similar climates
TownRatings has no climate map of the towns around De Borgia 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 De Borgia averaged 1.1° warmer than the 1900s. The biggest change is in January (+3.7°).
A smaller shift than in 72% 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 De Borgia compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with De Borgia’s place among Montana’s.
De Borgia weather by month
Highs, lows and precipitation from NOAA’s grid at De Borgia’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 32° | 20° | 3.2" | 19° – 32° |
| February | 37° | 21° | 2.8" | 18° – 36° |
| March | 45° | 25° | 3.1" | 28° – 42° |
| April | 53° | 30° | 2.3" | 36° – 48° |
| May | 64° | 37° | 2.5" | 45° – 56° |
| June | 71° | 43° | 2.6" | 53° – 66° |
| July | 82° | 48° | 1.0" | 54° – 71° |
| August | 81° | 46° | 1.0" | 59° – 67° |
| September | 71° | 40° | 1.4" | 51° – 61° |
| October | 54° | 32° | 2.8" | 37° – 50° |
| November | 38° | 26° | 3.6" | 26° – 38° |
| December | 31° | 21° | 3.6" | 20° – 30° |
| Year | 55° | 32° | 29.9" |
How much a month can swing
A normal is an average. July swings the most: from 1991 to 2020 its average ranged from 54° to 71°. August is the most reliable, staying within 9°.
Where De Borgia’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 De Borgia’s center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Haugan 1 W, MT, 5 miles from the town’s center, 260 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 De Borgia’s climate
What is the weather like in De Borgia?
A typical July afternoon reaches 82°, a January night drops to 20°. Colder January nights than 57% of U.S. towns; cooler July afternoons than 83% of U.S. towns.
How cold does it get in De Borgia in winter?
January nights average 20°. About 215 nights a year reach 32° or below and 10 reach 0° or below. In the coldest January of the last 30 years the month averaged 19°.
How hot does it get in De Borgia?
July, with a typical high of 82° and a low of 48°. About 24 days a year reach 90° (Haugan 1 W, MT).
When is the first and last frost in De Borgia?
There is no reliable frost-free season: at Haugan 1 W, MT, every month has nights at 32° or below, about 215 a year. In half of years the longest stretch without a freeze is about 90 days.
What growing zone is De Borgia in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −9°.
What is the best time of year to visit De Borgia?
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 De Borgia getting warmer?
Yes: 1991–2020 averaged 1.1° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 72% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in De Borgia.
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.