Miles City F Wiley Fld, MT Climate: Temperature & Rain by Month
Average temperature and precipitation from NOAA NCEI 1991–2020 normals →, with a derived climate comfort score
30-year climate normals (1991-2020) from Miles City F Wiley Fld's primary NOAA station, MILES CITY F WILEY FLD.
The climate verdict for Miles City F Wiley Fld
Dryness leads the climate profile for Miles City F Wiley Fld, Montana, with 12.9 inches of precipitation a year. NOAA records an annual average of 46°F. At 52/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 24% of scores.
- 46°F
- annual average temperature (NOAA normal)
- 52/100
- comfort score, above 24% of station-mapped location scores
- 12.9"
- annual precipitation
- 145 days
- growing season, frost-free days
Miles City F Wiley Fld: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00024037 · Miles City F Wiley Fld, MT 46°F mean · 12.9" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-DRY · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 46°F
- RANK-COOL #1,578
- PHOTO-FINISH ≈ Cottonwood
- PRCP-DRY 12.9"
- SWING-WIDE 55°F
- COMF-LOW 52/100
- LOAD-HEAT 7,566 HDD
- STN-1 USW00024037
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Cottonwood, SD (+ 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 MT station list.
- Miles City F Wi… (this station) 46°F
- Hot Mission Ridge, SD 46°F
- Near Cottonwood, SD 46°F
- Near Spencer, IA 46°F
- Near White Lake, SD 46°F
Miles City F Wiley Fld sits in Montana, the #6 coldest U.S. state at 43.4°F statewide annual average - see all 50 coldest states ranked by NOAA normals
Climate Living Index · Miles City F Wiley Fld
Miles City F Wiley Fld: 31/100 · grade F
Miles City F Wiley Fld publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals · NOAA hourly normals); 1 missing weight rescale to 100.
PlainClimate-derived for Miles City F Wiley Fld, not an official NOAA rating. Rankings still use Comfort Score 52/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Summer moisture balance | 48.4°F mean dew point | 84/100 · B |
| Annual temperature balance | 46.1°F · 21.4° from 67.5°F | 24/100 · F |
| Frost-free season | 145 days/year | 22/100 · F |
| Precipitation balance | 12.9 in · 22.1 from 35 in | 21/100 · F |
| Normal heat + freeze calendar | 195 calendar days | 17/100 · F |
Miles City F Wiley Fld · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Miles City F Wiley Fld's normals sit in a dry climate class: BSk
Precipitation is low relative to temperature but above true desert thresholds: cold semi-arid steppe (BSk). Class BSk is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: dry (arid or semi-arid), specifically cold semi-arid steppe.
- Köppen code
- BSk
- Group
- Dry (arid or semi-arid)
- Warmest month
- 74.2°F
- Coldest month
- 19.5°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 Miles City F Wiley Fld sits across the climate record
Three NOAA fields for Miles City F Wiley Fld's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 77%
- Among 6,861 stations, Miles City F Wiley Fld sits in the cooler third of annual means.
- Annual precipitation
- Drier than 88%
- Miles City F Wiley Fld's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Wider than 91%
- Warmest-to-coldest month gap for Miles City F Wiley Fld is large versus 6,861 complete station-years.
How Miles City F Wiley Fld compares across U.S. station-mapped locations
Miles City F Wiley Fld's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
52 24th percentile score exceeds 24% 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%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). This entry sits in this band.
- 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
Miles City F Wiley Fld's measured station temperature trend
MethodologyAcross 130 complete annual observations from 1878 to 2025, MILES CITY F WILEY FLD warmed at a fitted rate of 0.21°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Miles City F Wiley Fld primary station fitted change +0.21 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 30°F (-1°C) | 9°F (-13°C) | 20°F (-7°C) | 0.3" | 30.3 | 0.0 |
| February | 35°F (2°C) | 13°F (-11°C) | 24°F (-5°C) | 0.3" | 26.8 | 0.0 |
| March | 47°F (8°C) | 23°F (-5°C) | 35°F (2°C) | 0.6" | 24.9 | 0.0 |
| April | 58°F (15°C) | 33°F (0°C) | 46°F (8°C) | 1.5" | 12.8 | 0.1 |
| May | 68°F (20°C) | 43°F (6°C) | 56°F (13°C) | 2.7" | 2.7 | 0.6 |
| June | 79°F (26°C) | 53°F (11°C) | 66°F (19°C) | 2.5" | 0.0 | 4.3 |
| July | 89°F (32°C) | 60°F (15°C) | 74°F (23°C) | 1.5" | 0.0 | 15.9 |
| August | 87°F (31°C) | 58°F (14°C) | 73°F (23°C) | 0.9" | 0.0 | 15.1 |
| September | 76°F (24°C) | 47°F (8°C) | 61°F (16°C) | 1.1" | 0.9 | 4.3 |
| October | 59°F (15°C) | 34°F (1°C) | 46°F (8°C) | 1.0" | 11.4 | 0.3 |
| November | 44°F (7°C) | 21°F (-6°C) | 33°F (0°C) | 0.3" | 26.1 | 0.0 |
| December | 33°F (1°C) | 12°F (-11°C) | 22°F (-5°C) | 0.2" | 30.4 | 0.0 |
The year, day by day
Miles City F Wiley Fld works both ends of the calendar. Normal highs climb to 91°F by July 26 and hold at or above 90°F on 19 dates, then normal lows drop to freezing or below on 176 dates, bottoming at 8°F around January 6.
When the heat sits
Normal highs reach 90°F from July 19 through August 6, covering 19 dates. The broader mild season, normal highs of 70°F or more, runs May 22 to September 26.
This counts calendar dates whose 1991–2020 normal high reaches 90°F. It is a smaller number than the 90°F+ day counts in the monthly table above, which measure how often the threshold was actually crossed in a typical year. A date can average 88°F and still exceed 90°F in half of all years.
The freezing stretch
The normal low stays at or below 32°F into April 12, then returns to freezing around October 20, covering 176 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 May 29, when 40% of years recorded at least a hundredth of an inch. The driest is December 6 at 13%. Summed across the calendar, that is about 87 wet dates a year.
The widest day
August 25 carries the biggest normal gap between afternoon and dawn, 30°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Miles City F Wiley Fld.
Where Miles City F Wiley Fld Stands Nationally
A drier-than-most normal water year — around 13 inches, below what four out of five ranked stations collect.
Miles City F Wiley Fld earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall
5.1 days with precipitation
5.1 days with precipitation
6.3 days with precipitation
8.8 days with precipitation
12.0 days with precipitation
11.1 days with precipitation
8.0 days with precipitation
6.5 days with precipitation
6.5 days with precipitation
7.6 days with precipitation
5.4 days with precipitation
4.3 days with precipitation
Miles City F Wiley Fld runs a summer-peaked wet season
38% of Miles City F Wiley Fld'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 May at 2.7", on a wide 54.7°F gap between its warmest and coldest month. 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: May, June, April, taking 53% of the annual total between them.
- Driest month: December at 0.2".
- Winter share: 6% 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.
Miles City F Wiley Fld is dry, and what does fall arrives gently
Only about 87 days a year record measurable precipitation here, 24% of the calendar, and they carry 12.9" 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 May at about 12 wet days; the driest is December at about 4.
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.
Frost Dates & Growing Season
First Fall Freeze
September 30
50% probability date
Last Spring Freeze
May 8
50% probability date
Growing Season
145 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,566
Higher = more heating needed
Cooling Degree Days
731
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 72% | 9.4 | 47% | 29% |
| February | 69% | 9.6 | 46% | 30% |
| March | 58% | 10.6 | 42% | 30% |
| April | 55% | 11.1 | 43% | 26% |
| May | 58% | 10.2 | 43% | 24% |
| June | 51% | 9.5 | 57% | 11% |
| July | 43% | 9.2 | 65% | 8% |
| August | 43% | 9.1 | 63% | 10% |
| September | 52% | 9.6 | 59% | 17% |
| October | 62% | 10.0 | 50% | 26% |
| November | 71% | 9.2 | 49% | 28% |
| December | 72% | 9.0 | 49% | 30% |
Nationwide similar cities
Other rankable U.S. places outside MT closest to Miles City F Wiley Fld 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 (46°F here).
- Burlington, WI 46°F · 0.0°F off
- Cottonwood, SD 46°F · 0.0°F off
- Deaver, WY 46°F · 0.0°F off
- Dushore, PA 46°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (12.9" here), excluding temperature-peer places.
- Faywood, NM 12.9" · 0.0" off
- Blanding, UT 12.9" · 0.0" off
- Redlands, CA 12.9" · 0.0" off
- Hope, NM 12.9" · 0.0" off
Scarce-water calendar
Where Miles City F Wiley Fld's limited precipitation lands
heating led · dry · mid swing
Miles City F Wiley Fld's energy balance leans toward cold weather: 7,566 annual heating degree days against 731 for cooling. Its 54.7°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 145 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.
July and January mark the typical warm and cold ends of the calendar in Miles City F Wiley Fld's middle-range seasonal profile. The measured spread is 54.7°F. The annual average is 46°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Miles City F Wiley Fld's cold-season load does not imply a wet climate. Annual precipitation is 12.9 inches, which places the station in PlainClimate's dry range. Snowfall is not added to the interpretation because its annual value is missing. The snowfall and rainfall fields should be read separately rather than inferred from temperature.
Miles City F Wiley Fld wettest normal
May
May concentrates the scarce annual total (12.9 inches).
Miles City F Wiley Fld driest normal
December
December is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Miles City F Wiley Fld's climate
How dry is Miles City F Wiley Fld? ▼
How many days above 90°F does Miles City F Wiley Fld get? ▼
How much energy does heating and cooling require in Miles City F Wiley Fld? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Miles City F Wiley Fld's primary station: MILES CITY F WILEY FLD (USW00024037). 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 Miles City F Wiley Fld; 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 Miles City F Wiley Fld 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.