Bly, OR 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 Bly's primary NOAA station, BLY 4 SE.
The climate verdict for Bly
Dryness leads the climate profile for Bly, Oregon, with 15.1 inches of precipitation a year. NOAA records an annual average of 47°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.
- 47°F
- annual average temperature (NOAA normal)
- 52/100
- comfort score, above 24% of station-mapped location scores
- 15.1"
- annual precipitation
- 101 days
- frost-free growing season
Bly: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00350856 · Bly, OR 47°F mean · 15.1" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-DRY · SWING-MID · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 47°F
- RANK-COOL #1,852
- PHOTO-FINISH ≈ Cumbre Vista -…
- PRCP-DRY 15.1"
- SWING-MID 37°F
- COMF-LOW 52/100
- LOAD-HEAT 6,774 HDD
- STN-1 USC00350856
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Cumbre Vista - Colorado Spgs, CO (+ 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 OR station list.
- Bly (this station) 47°F
- Cold Potlatch, ID 47°F
- Hot Klamath Falls, OR 47°F
- Near Cumbre Vista -…, CO 47°F
- Near Sines Deep Creek, MD 47°F
Climate Living Index · Bly
Bly: 19/100 · grade F
Bly publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Bly, not an official NOAA rating. Rankings still use Comfort Score 52/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 15.1 in · 19.9 from 35 in | 29/100 · F |
| Annual temperature balance | 47.0°F · 20.5° from 67.5°F | 27/100 · F |
| Normal heat + freeze calendar | 204 calendar days | 12/100 · F |
| Frost-free season | 101 days/year | 0/100 · F |
Bly · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Bly is a continental Köppen climate: Dsb
Coldest-month mean 30.5°F and warmest-month mean 67.5°F place this station in continental, dry-summer, warm summer climates (Dsb). Class Dsb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, dry-summer, warm summer.
- Köppen code
- Dsb
- Group
- Continental
- Warmest month
- 67.5°F
- Coldest month
- 30.5°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 Bly sits across the climate record
Three NOAA fields for Bly's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 73%
- Among 6,861 stations, Bly sits in the cooler third of annual means.
- Annual precipitation
- Drier than 82%
- Bly's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 77%
- Warmest-to-coldest month gap for Bly is compact versus 6,861 complete station-years.
How Bly compares across U.S. station-mapped locations
Bly'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
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 42°F (6°C) | 21°F (-6°C) | 32°F (0°C) | 1.1" | 27.4 | 0.0 |
| February | 46°F (8°C) | 23°F (-5°C) | 35°F (1°C) | 1.4" | 25.5 | 0.0 |
| March | 51°F (11°C) | 26°F (-3°C) | 39°F (4°C) | 1.3" | 26.5 | 0.0 |
| April | 57°F (14°C) | 29°F (-2°C) | 43°F (6°C) | 1.6" | 21.7 | 0.0 |
| May | 66°F (19°C) | 37°F (3°C) | 52°F (11°C) | 1.5" | 10.3 | 0.4 |
| June | 76°F (24°C) | 41°F (5°C) | 59°F (15°C) | 1.1" | 2.7 | 1.9 |
| July | 86°F (30°C) | 49°F (9°C) | 68°F (20°C) | 0.9" | 0.1 | 13.1 |
| August | 86°F (30°C) | 45°F (7°C) | 65°F (19°C) | 0.3" | 0.3 | 9.2 |
| September | 78°F (25°C) | 38°F (3°C) | 58°F (14°C) | 0.6" | 5.6 | 2.3 |
| October | 64°F (18°C) | 30°F (-1°C) | 47°F (8°C) | 1.2" | 18.9 | 0.1 |
| November | 49°F (9°C) | 25°F (-4°C) | 37°F (3°C) | 1.7" | 23.5 | 0.0 |
| December | 41°F (5°C) | 20°F (-6°C) | 31°F (-1°C) | 2.4" | 26.5 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 88°F around July 25, short of 90°F on every date, while 204 dates carry a normal low at or below freezing, the coldest 20°F near December 18.
The freezing stretch
The normal low stays at or below 32°F into April 26, then returns to freezing around October 6, covering 204 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 December 26, when 48% of years recorded at least a hundredth of an inch. The driest is August 12 at 7%. Summed across the calendar, that is about 107 wet dates a year.
The widest day
August 13 carries the biggest normal gap between afternoon and dawn, 41°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Bly.
Where Bly Stands Nationally
Winters bite deep and often: the normal nightly low dips to freezing or below on around 204 nights a year, placing this among the most frost-prone tenth of ranked stations.
Day-to-night contrast is extreme by national standards — the widest normal daily swing reaches about 41°F, sharper than nine in ten ranked stations see.
Bly earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
12.0 days with precipitation
10.9 days with precipitation
12.3 days with precipitation
13.9 days with precipitation
10.1 days with precipitation
5.9 days with precipitation
2.4 days with precipitation
2.2 days with precipitation
3.1 days with precipitation
7.3 days with precipitation
12.0 days with precipitation
14.6 days with precipitation
Bly spreads its precipitation across the year
Neither half of the year dominates here: June through August take 15% of the annual total and December through February 33%, with neither reaching the 35% that would mark a distinct wet season. Bly has no dry season to plan around, though it does carry a 37°F seasonal spread.
The gap between the wettest and driest month still matters: December averages 2.4" and August 0.3". The three wettest months together take 38% 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.
Bly is dry, and what does fall arrives gently
Only about 107 days a year record measurable precipitation here, 29% of the calendar, and they carry 15.1" between them. At roughly 0.14 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 December at about 15 wet days; the driest is August at about 2.
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 17
50% probability date
Last Spring Freeze
June 8
50% probability date
Growing Season
101 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,774
Higher = more heating needed
Cooling Degree Days
224
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside OR closest to Bly 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 (47°F here).
- Alma, MI 47°F · 0.0°F off
- Anamosa, IA 47°F · 0.0°F off
- Audubon, IA 47°F · 0.0°F off
- Big Timber, MT 47°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (15.1" here), excluding temperature-peer places.
- Guernsey, WY 15.1" · 0.0" off
- Lee Vining, CA 15.1" · 0.0" off
- Monticello, UT 15.1" · 0.0" off
- Potomac, MT 15.1" · 0.0" off
Data-derived climate profile
How Bly's climate pattern fits together
heating led · dry · mid swing
Bly's energy balance leans toward cold weather: 6,774 annual heating degree days against 224 for cooling. Its 37.0°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 101 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 December mark the typical warm and cold ends of the calendar in Bly's middle-range seasonal profile. The measured spread is 37.0°F. The annual average is 47°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Bly's cold-season load does not imply a wet climate. Annual precipitation is 15.1 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.
These labels group NOAA 1991-2020 normals from Bly's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Bly, not an official NOAA class or a year-ahead forecast.
Questions about Bly's climate
How much rain does Bly get? ▼
How cold does Bly get in winter? ▼
How much energy does heating and cooling require in Bly? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Bly's primary station: BLY 4 SE (USC00350856). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as a census-designated place (GEOID 4107150), not an incorporated municipality. Match rule for Bly: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Bly 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.