Grant, CO Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Grant's primary NOAA station, GRANT.
The climate verdict for Grant
Dryness leads the climate profile for Grant, Colorado, with 15.4 inches of precipitation a year. NOAA records an annual average of 39°F. At 34/100 (below average) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 2% of scores.
- 39°F
- annual average temperature (NOAA normal)
- 34/100
- comfort score, above 2% of station-mapped location scores
- 15.4"
- annual precipitation · 82" snow
- 86 days
- growing season, frost-free days
Grant: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00053530 · Grant, CO 39°F mean · 15.4" precip
TEMP-COLD · RANK-COOL · PHOTO-FINISH · PRCP-DRY · SWING-MID · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COLD 39°F
- RANK-COOL #274
- PHOTO-FINISH ≈ Scofield-skylin…
- PRCP-DRY 15.4"
- SWING-MID 38°F
- COMF-LOW 34/100
- LOAD-HEAT 9,581 HDD
- STN-1 USC00053530
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Scofield-skyline Mine, UT (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every CO station list.
- Grant (this station) 39°F
- Hot Lennep, MT 39°F
- Near Scofield-skylin…, UT 39°F
- Near Meredith, CO 39°F
- Near Sunshine, WY 39°F
Climate Living Index · Grant
Grant: 6/100 · grade F
Grant publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Grant, not an official NOAA rating. Rankings still use Comfort Score 34/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 15.4 in · 19.6 from 35 in | 30/100 · F |
| Snowfall burden | 82.0 inches/year | 5/100 · F |
| Annual temperature balance | 38.7°F · 28.8° from 67.5°F | 1/100 · F |
| Frost-free season | 86 days/year | 0/100 · F |
| Normal heat + freeze calendar | 243 calendar days | 0/100 · F |
Grant · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Grant is a continental Köppen climate: Dfb
Coldest-month mean 21.1°F and warmest-month mean 59.1°F place this station in continental, no dry season, warm summer climates (Dfb). Class Dfb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, warm summer.
- Köppen code
- Dfb
- Group
- Continental
- Warmest month
- 59.1°F
- Coldest month
- 21.1°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Grant sits across the climate record
Three NOAA fields for Grant's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 96%
- Among 6,861 stations, Grant sits in the cooler third of annual means.
- Annual precipitation
- Drier than 82%
- Grant's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 73%
- Warmest-to-coldest month gap for Grant is compact versus 6,861 complete station-years.
How Grant compares across U.S. station-mapped locations
Grant's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
34 2nd percentile score exceeds 2% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). This entry sits in this band.
- 40–50: 1,113 station-mapped locations (18%). Above this entry.
- 50–60: 1,329 station-mapped locations (21%). Above this entry.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Grant's measured station temperature trend
MethodologyAcross 55 complete annual observations from 1964 to 2025, GRANT warmed at a fitted rate of 0.24°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Grant primary station fitted change +0.24 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 34°F (1°C) | 9°F (-13°C) | 22°F (-6°C) | 0.6" | 9.9" | 30.9 | 0.0 |
| February | 36°F (2°C) | 9°F (-13°C) | 23°F (-5°C) | 0.7" | 10.4" | 27.9 | 0.0 |
| March | 43°F (6°C) | 16°F (-9°C) | 30°F (-1°C) | 1.0" | 15.3" | 30.8 | 0.0 |
| April | 49°F (9°C) | 22°F (-5°C) | 36°F (2°C) | 1.5" | 13.8" | 28.6 | 0.0 |
| May | 59°F (15°C) | 30°F (-1°C) | 45°F (7°C) | 1.7" | 4.8" | 18.6 | 0.0 |
| June | 70°F (21°C) | 38°F (3°C) | 54°F (12°C) | 1.4" | 0.1" | 3.4 | 0.0 |
| July | 75°F (24°C) | 43°F (6°C) | 59°F (15°C) | 2.6" | 0.0" | 0.2 | 0.0 |
| August | 72°F (22°C) | 42°F (5°C) | 57°F (14°C) | 2.3" | 0.0" | 0.3 | 0.0 |
| September | 66°F (19°C) | 35°F (1°C) | 50°F (10°C) | 1.4" | 0.8" | 8.6 | 0.0 |
| October | 54°F (12°C) | 25°F (-4°C) | 40°F (4°C) | 1.0" | 5.5" | 25.5 | 0.0 |
| November | 42°F (5°C) | 17°F (-9°C) | 29°F (-2°C) | 0.7" | 9.6" | 29.7 | 0.0 |
| December | 33°F (1°C) | 9°F (-13°C) | 21°F (-6°C) | 0.6" | 11.8" | 31.0 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 75°F around July 14, short of 90°F on every date, while 243 dates carry a normal low at or below freezing, the coldest 8°F near December 20.
The freezing stretch
The normal low stays at or below 32°F into May 23, then returns to freezing around September 24, covering 243 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is August 2, when 50% of years recorded at least a hundredth of an inch. The driest is November 16 at 20%. Summed across the calendar, that is about 106 wet dates a year.
The widest day
June 18 carries the biggest normal gap between afternoon and dawn, 33°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Grant.
Where Grant Stands Nationally
Winters bite deep and often: the normal nightly low dips to freezing or below on around 243 nights a year, placing this among the most frost-prone tenth of ranked stations.
A drier-than-most normal water year — around 15 inches, below what four out of five ranked stations collect.
Grant earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 9.9"
6.3 days with precipitation
Snow: 10.4"
7.1 days with precipitation
Snow: 15.3"
8.2 days with precipitation
Snow: 13.8"
8.6 days with precipitation
Snow: 4.8"
9.5 days with precipitation
Snow: 0.1"
8.6 days with precipitation
14.0 days with precipitation
15.0 days with precipitation
Snow: 0.8"
8.8 days with precipitation
Snow: 5.5"
6.6 days with precipitation
Snow: 9.6"
5.6 days with precipitation
Snow: 11.8"
6.8 days with precipitation
Grant runs a summer-peaked wet season
41% of Grant's yearly precipitation falls in June, July and August alone, against the 25% an evenly spread year would give those three months. The wettest month is July at 2.6", on a 38°F seasonal spread. Warm-season convection and, across the Southwest, the North American monsoon produce this shape: rain arrives in short heavy bursts during the hottest part of the year rather than as long cool-season soaking.
- Wettest three months: July, August, May, taking 43% of the annual total between them.
- Driest month: January at 0.6".
- Winter share: 12% falls in December, January and February.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A summer-peaked label means the June-August share reaches 35%; it describes timing across an average year, not any single season, and says nothing about how heavy an individual storm can be.
Grant is dry, and what does fall arrives gently
Only about 105 days a year record measurable precipitation here, 29% of the calendar, and they carry 15.4" between them. At roughly 0.15 inches on an average wet day, this is not the damp drizzle of a marine climate; it is an arid record in which precipitation is both uncommon and light when it appears.
The wettest month by count is August at about 15 wet days; the driest is November at about 6.
A low per-event average in a dry record is a statement about typical days only. Arid regions can still take a large share of a year's total from a single convective storm, which a normal cannot show.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, not the extremes within it.
Winter brings real snow to Grant
Grant averages 82.0 inches of snowfall a year, with March the snowiest month on the normals, spread across roughly 42 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 82.0 inches of depth.
- Days recording measurable snow: about 42 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 53% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
September 9
50% probability date
Last Spring Freeze
June 15
50% probability date
Growing Season
86 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
9,581
Higher = more heating needed
Cooling Degree Days
2
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside CO closest to Grant on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (39°F here).
- Dillon, MT 39°F · 0.0°F off
- Leeds, ND 39°F · 0.0°F off
- Stanley, ND 39°F · 0.0°F off
- Fosston, MN 39°F · 0.1°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (15.4" here), excluding temperature-peer places.
- Healy, AK 15.4" · 0.0" off
- Salinas, CA 15.4" · 0.0" off
- Cheyenne, WY 15.4" · 0.0" off
- Lompoc, CA 15.4" · 0.0" off
Snow and freeze rhythm
When cold and snow define Grant
heating led · dry · mid swing
Grant's energy balance leans toward cold weather: 9,581 annual heating degree days against 2 for cooling. Its 38.0°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 86 days are frost-free in a normal year. That short interval is consistent with the cold-season signal, but the measure does not predict the exact first or last freeze in any one year.
-
1. Grant coldest normal
December
Averaging 21°F (-6°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Grant typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Grant snow peak
March
Grant averages 82.0 inches of snow a year, with March the snowiest month on the normals.
Questions about Grant's climate
How much snow does Grant get? ▼
How cold does Grant get in winter? ▼
How much energy does heating and cooling require in Grant? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Grant's primary station: GRANT (USC00053530). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Grant; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Grant comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.