Chilly Barton Flat, ID Climate: Temperature & Rain by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from Chilly Barton Flat's primary NOAA station, CHILLY BARTON FLAT.
The climate verdict for Chilly Barton Flat
Dryness leads the climate profile for Chilly Barton Flat, Idaho, with 8.0 inches of precipitation a year. NOAA records an annual average of 41°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.
- 41°F
- yearly average temperature, NOAA normal
- 34/100
- comfort score, above 2% of station-mapped location scores
- 8.0"
- annual precipitation · 18" snow
- 86 days
- growing season, frost-free days
Chilly Barton Flat: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00101671 · Chilly Barton Flat, ID 41°F mean · 8.0" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-ARID · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 41°F
- RANK-COOL #480
- PHOTO-FINISH ≈ Tizer Gardens
- PRCP-ARID 8.0"
- SWING-WIDE 46°F
- COMF-LOW 34/100
- LOAD-HEAT 8,818 HDD
- STN-1 USC00101671
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Tizer Gardens, MT (+ 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 ID station list.
- Chilly Barton F… (this station) 41°F
- Cold Millegan, MT 41°F
- Hot Tizer Gardens, MT 41°F
- Near Holden Village, WA 41°F
- Near Divide, MT 41°F
Climate Living Index · Chilly Barton Flat
Chilly Barton Flat: 11/100 · grade F
Chilly Barton Flat publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Chilly Barton Flat, not an official NOAA rating. Rankings still use Comfort Score 34/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Snowfall burden | 18.3 inches/year | 51/100 · D |
| Annual temperature balance | 41.0°F · 26.5° from 67.5°F | 7/100 · F |
| Normal heat + freeze calendar | 215 calendar days | 7/100 · F |
| Precipitation balance | 8.0 in · 27.0 from 35 in | 7/100 · F |
| Frost-free season | 86 days/year | 0/100 · F |
Chilly Barton Flat · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Chilly Barton Flat'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
- 64.5°F
- Coldest month
- 19.0°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 Chilly Barton Flat sits across the climate record
Three NOAA fields for Chilly Barton Flat's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 93%
- Among 6,861 stations, Chilly Barton Flat sits in the cooler third of annual means.
- Annual precipitation
- Drier than 97%
- Chilly Barton Flat's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- 62nd percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Chilly Barton Flat compares across U.S. station-mapped locations
Chilly Barton Flat'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
Chilly Barton Flat's measured station temperature trend
MethodologyAcross 38 complete annual observations from 1951 to 2025, CHILLY BARTON FLAT warmed at a fitted rate of 0.16°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Chilly Barton Flat primary station fitted change +0.16 °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 | 31°F (-1°C) | 7°F (-14°C) | 19°F (-7°C) | 0.3" | 4.6" | 30.9 | 0.0 |
| February | 34°F (1°C) | 11°F (-12°C) | 22°F (-5°C) | 0.2" | 2.7" | 27.7 | 0.0 |
| March | 44°F (6°C) | 21°F (-6°C) | 32°F (0°C) | 0.5" | 1.9" | 29.1 | 0.0 |
| April | 53°F (12°C) | 28°F (-2°C) | 40°F (5°C) | 0.7" | 1.3" | 23.5 | 0.0 |
| May | 63°F (17°C) | 35°F (2°C) | 49°F (9°C) | 1.2" | 0.4" | 12.4 | 0.0 |
| June | 72°F (22°C) | 41°F (5°C) | 57°F (14°C) | 1.5" | 0.2" | 3.0 | 0.1 |
| July | 82°F (28°C) | 47°F (8°C) | 65°F (18°C) | 0.6" | 0.0" | 0.3 | 2.7 |
| August | 80°F (27°C) | 45°F (7°C) | 63°F (17°C) | 0.7" | 0.0" | 0.5 | 1.6 |
| September | 72°F (22°C) | 37°F (3°C) | 54°F (12°C) | 0.7" | 0.2" | 7.5 | 0.1 |
| October | 57°F (14°C) | 28°F (-2°C) | 43°F (6°C) | 0.8" | 0.9" | 22.9 | 0.0 |
| November | 41°F (5°C) | 18°F (-8°C) | 29°F (-1°C) | 0.4" | 1.6" | 28.3 | 0.0 |
| December | 30°F (-1°C) | 9°F (-13°C) | 19°F (-7°C) | 0.4" | 4.5" | 30.8 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 84°F around July 24, short of 90°F on every date, while 215 dates carry a normal low at or below freezing, the coldest 7°F near January 1.
The freezing stretch
The normal low stays at or below 32°F into May 6, then returns to freezing around October 5, covering 215 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 27, when 30% of years recorded at least a hundredth of an inch. The driest is February 2 at 12%. Summed across the calendar, that is about 67 wet dates a year.
The widest day
July 22 carries the biggest normal gap between afternoon and dawn, 36°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Chilly Barton Flat.
Where Chilly Barton Flat Stands Nationally
Winters bite deep and often: the normal nightly low dips to freezing or below on around 215 nights a year, placing this among the most frost-prone tenth of ranked stations.
Aridity defines the water calendar: about 8 inches in a normal year lands this among the driest tenth of ranked stations.
Chilly Barton Flat 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: 4.6"
4.4 days with precipitation
Snow: 2.7"
3.5 days with precipitation
Snow: 1.9"
4.2 days with precipitation
Snow: 1.3"
7.3 days with precipitation
Snow: 0.4"
8.7 days with precipitation
Snow: 0.2"
7.8 days with precipitation
5.2 days with precipitation
5.7 days with precipitation
Snow: 0.2"
4.5 days with precipitation
Snow: 0.9"
5.2 days with precipitation
Snow: 1.6"
5.0 days with precipitation
Snow: 4.5"
5.4 days with precipitation
Chilly Barton Flat spreads its precipitation across the year
Neither half of the year dominates here: June through August take 34% of the annual total and December through February 12%, with neither reaching the 35% that would mark a distinct wet season. Chilly Barton Flat has no dry season to plan around, though it does carry a wide 45.5°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: June averages 1.5" and February 0.2". The three wettest months together take 44% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
Chilly Barton Flat is dry, and what does fall arrives gently
Only about 67 days a year record measurable precipitation here, 18% of the calendar, and they carry 8.0" between them. At roughly 0.12 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 9 wet days; the driest is February 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.
Winter brings real snow to Chilly Barton Flat
Chilly Barton Flat averages 18.3 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 16 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: 18.3 inches of depth.
- Days recording measurable snow: about 16 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 23% 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 8
50% probability date
Last Spring Freeze
June 14
50% probability date
Growing Season
86 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,818
Higher = more heating needed
Cooling Degree Days
92
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside ID closest to Chilly Barton Flat 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 (41°F here).
- Baraga, MI 41°F · 0.0°F off
- Butte, ND 41°F · 0.0°F off
- Garrison, ND 41°F · 0.0°F off
- Hazelton, ND 41°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (8.0" here), excluding temperature-peer places.
- Arizona City, AZ 8.0" · 0.0" off
- Shoshoni, WY 8.0" · 0.0" off
- Casa Grande, AZ 7.9" · 0.0" off
- Castle Dale, UT 8.0" · 0.0" off
Snow and freeze rhythm
When cold and snow define Chilly Barton Flat
heating led · dry · mid swing
Chilly Barton Flat's energy balance leans toward cold weather: 8,818 annual heating degree days against 92 for cooling. Its 45.5°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. Chilly Barton Flat coldest normal
January
Averaging 19°F (-7°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Chilly Barton Flat typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Chilly Barton Flat snow peak
January
Chilly Barton Flat averages 18.3 inches of snow a year, with January the snowiest month on the normals.
Questions about Chilly Barton Flat's climate
How much snow does Chilly Barton Flat get? ▼
How cold does Chilly Barton Flat get in winter? ▼
How much energy does heating and cooling require in Chilly Barton Flat? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Chilly Barton Flat's primary station: CHILLY BARTON FLAT (USC00101671). 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 Chilly Barton Flat; 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 Chilly Barton Flat 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.