Bly (4 mi SE), Oregon climate: Climate normals at a NOAA weather station
Bly (4 mi SE)'s normal year runs from 20°F December nights to 86°F July afternoons, with 15.1 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.3°C, December lows of −6°C, July highs of 30°C, 384 mm of precipitation a year.
- NOAA stationBly (4 mi SE)
- Station IDUSC00350856
- Location42.22°N 120.58°W
- Elevation4,560 ft (1,390 m)
On October 22, the normal high in Bly (4 mi SE) is 61°F and the normal low 29°F, and the chance of measurable rain or snow is 26%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Bly (4 mi SE).
- Jan 42° 21°
- Feb 46° 23°
- Mar 51° 26°
- Apr 57° 29°
- May 66° 37°
- Jun 76° 41°
- Jul 86° 49°
- Aug 86° 45°
- Sep 78° 38°
- Oct 64° 30°
- Nov 49° 25°
- Dec 41° 20°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Bly (4 mi SE) each month?
July is the warmest month, with normal highs of 86°F; December the coldest, with normal lows of 20°F. The most precipitation falls in December (2.41 in), the least in August (0.28 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 42°F | 21°F | 31.8°F | 1.14 | 12 | <1 | 27 | 9 h 20 min |
| February | 46°F | 23°F | 34.5°F | 1.45 | 11 | <1 | 26 | 10 h 30 min |
| March | 51°F | 26°F | 38.8°F | 1.26 | 12 | <1 | 27 | 11 h 50 min |
| April | 57°F | 29°F | 43.3°F | 1.61 | 14 | <1 | 22 | 13 h 20 min |
| May | 66°F | 37°F | 51.6°F | 1.47 | 10 | <1 | 10 | 14 h 30 min |
| June | 76°F | 41°F | 58.6°F | 1.07 | 6 | 2 | 3 | 15 h 10 min |
| July | 86°F | 49°F | 67.5°F | 0.94 | 2 | 13 | <1 | 15 h |
| August | 86°F | 45°F | 65.4°F | 0.28 | 2 | 9 | <1 | 14 h |
| September | 78°F | 38°F | 57.9°F | 0.55 | 3 | 2 | 6 | 12 h 30 min |
| October | 64°F | 30°F | 47.0°F | 1.20 | 7 | <1 | 19 | 11 h 10 min |
| November | 49°F | 25°F | 36.9°F | 1.72 | 12 | <1 | 24 | 9 h 50 min |
| December | 41°F | 20°F | 30.5°F | 2.41 | 15 | <1 | 27 | 9 h 10 min |
| Year (annual) | 62°F | 32°F | 47.0°F | 15.10 | 107 | 27 | 189 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 6°C | −6°C | −0.1°C | 29 mm |
| February | 8°C | −5°C | 1.4°C | 37 mm |
| March | 11°C | −3°C | 3.8°C | 32 mm |
| April | 14°C | −2°C | 6.3°C | 41 mm |
| May | 19°C | 3°C | 10.9°C | 37 mm |
| June | 24°C | 5°C | 14.8°C | 27 mm |
| July | 30°C | 9°C | 19.7°C | 24 mm |
| August | 30°C | 7°C | 18.6°C | 7 mm |
| September | 25°C | 3°C | 14.4°C | 14 mm |
| October | 18°C | −1°C | 8.3°C | 30 mm |
| November | 9°C | −4°C | 2.7°C | 44 mm |
| December | 5°C | −6°C | −0.8°C | 61 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Lakeview (11 miles away), gets 55 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00350856; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
Which months are mildest at Bly (4 mi SE)?
Normal highs sit between 65°F and 85°F in May, June and September. Of those, September has the fewest days with rain (3).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00350856.
When is the last frost at Bly (4 mi SE)?
In Bly (4 mi SE), the last spring frost (32°F) comes after June 8 in half of years and after June 23 in one year in ten; the first autumn frost comes before September 17 in half of years and before September 1 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- June 81 year in 10 after June 23; 9 in 10 after May 18
- First autumn frost, half of years before
- September 171 year in 10 before September 1; 9 in 10 before October 3
NOAA puts the median frost-free season at 101 days, and the season without a hard freeze (28°F) at 139 days.
A hard freeze (28°F) comes after May 13 in half of springs and before October 1 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Bly (4 mi SE) in zone 6b in ZIP code 97630, the nearest ZIP area.
Frost dates for every NOAA station in Oregon · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00350856; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get at Bly (4 mi SE)?
In a normal year in Bly (4 mi SE), 27 days a year reach 90°F (1 of them 100°F or more), 189 nights fall to 32°F or colder and 107 days bring measurable precipitation.
- Days at 90°F or more
- 27a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 189a normal year
- Days that stay below freezing
- 9high of 32°F or less
- Days with 0.01 inch of precipitation
- 107a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00350856.
How sunny is it at Bly (4 mi SE)?
Over a year 81% of the sunlight that would reach the ground under clear skies gets through the clouds at Bly (4 mi SE), 4.7 kWh per square metre a day. July is the sunniest month (93%) and December the cloudiest (62%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 67% | 1.9 |
| February | 69% | 2.8 |
| March | 70% | 4.0 |
| April | 74% | 5.4 |
| May | 78% | 6.6 |
| June | 86% | 7.7 |
| July | 93% | 8.0 |
| August | 92% | 6.9 |
| September | 89% | 5.4 |
| October | 82% | 3.6 |
| November | 70% | 2.1 |
| December | 62% | 1.5 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How many heating and cooling degree days does Bly (4 mi SE) record?
A normal year at Bly (4 mi SE) brings 6,774 heating degree days, 26% more than the median U.S. place (5,373), and 224 cooling degree days, 75% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 1,756 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,028 | 0 |
| February | 854 | 0 |
| March | 814 | 0 |
| April | 651 | 0 |
| May | 420 | 4 |
| June | 209 | 15 |
| July | 40 | 116 |
| August | 63 | 75 |
| September | 226 | 13 |
| October | 558 | 0 |
| November | 843 | 0 |
| December | 1,069 | 0 |
| Year (annual) | 6,774 | 224 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00350856. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
How does Bly (4 mi SE)'s climate compare?
Bly (4 mi SE) is warmer than 12 of the 105 places with their own NOAA record in Oregon, and wetter than 30. Across the 7,247 U.S. stations with normals, its annual mean of 47.0°F is warmer than 28%.
In the Köppen classification computed from these normals, Bly (4 mi SE) is Dsb: continental, dry-summer, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Questions about Bly (4 mi SE)'s climate
What is the coldest month at Bly (4 mi SE)?
December, with a normal high of 41°F and a normal low of 20°F. The warmest is July (86°F by day, 49°F at night).
Does it snow at Bly (4 mi SE)?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Lakeview (11 miles away), records 55 inches of snow in a normal year.
What is the rainiest month at Bly (4 mi SE)?
December, with 2.41 in of precipitation in a normal year; the driest is August with 0.28 in.
What plant hardiness zone is Bly (4 mi SE) in?
The USDA's 2023 map puts Bly (4 mi SE) in zone 6b in ZIP code 97630, the nearest ZIP area.
How late can frost come at Bly (4 mi SE)?
In half of years the last 32°F night comes after June 8; in one year in ten it comes after June 23. Waiting until June 23 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Oregon climateThe statewide normals and every place in the state
- Lakeview, OR11 miles from this station, 47.0°F a year
- Gerber Dam, OR29 miles from this station, 46.6°F a year
- Fort Bidwell, CA32 miles from this station, 48.6°F a year
- Paisley, OR33 miles from this station, 47.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made