Roseburg, Oregon climate: Normal weather by month, frost dates and records
Roseburg's normal year runs from 37°F December nights to 86°F July afternoons, with 32.1 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 13.3°C, December lows of 3°C, July highs of 30°C, 815 mm of precipitation a year.
- NOAA stationRoseburg Regional Airport
- Station IDUSW00024231
- Location43.24°N 123.35°W
- Elevation525 ft (160 m)
- Population23,795
On October 14, the normal high in Roseburg is 68°F and the normal low 45°F, and the chance of measurable rain or snow is 37%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Roseburg.
- Jan 50° 37°
- Feb 54° 38°
- Mar 59° 40°
- Apr 63° 43°
- May 71° 48°
- Jun 77° 53°
- Jul 86° 57°
- Aug 86° 57°
- Sep 80° 52°
- Oct 67° 45°
- Nov 54° 41°
- Dec 48° 37°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Roseburg each month?
July is the warmest month, with normal highs of 86°F; December the coldest, with normal lows of 37°F. The most precipitation falls in December (6.05 in), the least in August (0.23 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 50°F | 37°F | 43.6°F | 4.82 | 18 | <1 | 7 | 9 h 20 min |
| February | 54°F | 38°F | 45.7°F | 3.62 | 17 | <1 | 6 | 10 h 30 min |
| March | 59°F | 40°F | 49.2°F | 3.47 | 17 | <1 | 4 | 11 h 50 min |
| April | 63°F | 43°F | 52.9°F | 2.71 | 15 | <1 | 1 | 13 h 20 min |
| May | 71°F | 48°F | 59.5°F | 2.09 | 11 | 1 | <1 | 14 h 40 min |
| June | 77°F | 53°F | 64.6°F | 0.93 | 6 | 3 | <1 | 15 h 20 min |
| July | 86°F | 57°F | 71.6°F | 0.26 | 1 | 10 | <1 | 15 h 10 min |
| August | 86°F | 57°F | 71.5°F | 0.23 | 2 | 11 | <1 | 14 h |
| September | 80°F | 52°F | 66.1°F | 0.85 | 5 | 5 | <1 | 12 h 30 min |
| October | 67°F | 45°F | 56.1°F | 2.32 | 12 | <1 | 1 | 11 h 10 min |
| November | 54°F | 41°F | 47.4°F | 4.72 | 18 | <1 | 3 | 9 h 50 min |
| December | 48°F | 37°F | 42.5°F | 6.05 | 20 | <1 | 7 | 9 h |
| Year (annual) | 66°F | 46°F | 55.9°F | 32.07 | 141 | 31 | 28 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 10°C | 3°C | 6.4°C | 122 mm |
| February | 12°C | 3°C | 7.6°C | 92 mm |
| March | 15°C | 4°C | 9.6°C | 88 mm |
| April | 17°C | 6°C | 11.6°C | 69 mm |
| May | 22°C | 9°C | 15.3°C | 53 mm |
| June | 25°C | 11°C | 18.1°C | 24 mm |
| July | 30°C | 14°C | 22.0°C | 7 mm |
| August | 30°C | 14°C | 21.9°C | 6 mm |
| September | 27°C | 11°C | 18.9°C | 22 mm |
| October | 19°C | 7°C | 13.4°C | 59 mm |
| November | 12°C | 5°C | 8.6°C | 120 mm |
| December | 9°C | 3°C | 5.8°C | 154 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. Roseburg's own co-op station Roseburg Kqen does: 0 inches of snow in a normal year (see the other stations below).
Source: NOAA NCEI 1991-2020 monthly normals, station USW00024231; 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.
When is the best weather to visit Roseburg?
Normal highs sit between 65°F and 85°F in May, June, September and October. Of those, September has the fewest days with rain (5).
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 USW00024231.
When is the last frost in Roseburg?
In Roseburg, the last spring frost (32°F) comes after March 19 in half of years and after April 13 in one year in ten; the first autumn frost comes before November 20 in half of years and before October 27 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
- March 191 year in 10 after April 13; 9 in 10 after February 18
- First autumn frost, half of years before
- November 201 year in 10 before October 27; 9 in 10 before December 17
NOAA puts the median frost-free season at 245 days, and the season without a hard freeze (28°F) at 307 days.
A hard freeze (28°F) comes after February 13 in half of springs and before December 11 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Roseburg in zone 8b in ZIP code 97495, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Roseburg's NOAA station is in zone 9a: the coldest night of a typical year reaches 22°F (23 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Oregon · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00024231; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. 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 in Roseburg?
In a normal year in Roseburg, 31 days a year reach 90°F (3 of them 100°F or more), 28 nights fall to 32°F or colder and 141 days bring measurable precipitation.
- Days at 90°F or more
- 31a normal year
- Days at 100°F or more
- 3a normal year
- Nights at 32°F or colder
- 28a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 141a normal year
The highest temperature in this station's record (since 1900) is 114°F, on June 27, 2021; the lowest is −1°F, on January 22, 1962.
The wettest calendar year on that record is 1950, with 46.44 in; the snowiest season is 1949–50, with 23.4 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00024231; records: ACIS (NOAA Regional Climate Centers), station USW00024231. Records use complete months only; a month missing more than three days is left out.
How sunny is Roseburg?
Over a year 74% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Roseburg, 4.0 kWh per square metre a day. July is the sunniest month (88%) and December the cloudiest (55%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 59% | 1.5 |
| February | 62% | 2.3 |
| March | 63% | 3.4 |
| April | 67% | 4.7 |
| May | 72% | 5.9 |
| June | 76% | 6.6 |
| July | 88% | 7.3 |
| August | 88% | 6.3 |
| September | 83% | 4.8 |
| October | 72% | 3.0 |
| November | 60% | 1.6 |
| December | 55% | 1.2 |
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 much heating and cooling does Roseburg need?
A normal year in Roseburg brings 3,913 heating degree days, 27% fewer than the median U.S. place (5,373), and 607 cooling degree days, 33% fewer than the median (908). Six months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,007 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 663 | 0 |
| February | 542 | 0 |
| March | 491 | 0 |
| April | 365 | 3 |
| May | 196 | 24 |
| June | 79 | 67 |
| July | 7 | 212 |
| August | 5 | 207 |
| September | 53 | 88 |
| October | 285 | 7 |
| November | 528 | 0 |
| December | 697 | 0 |
| Year (annual) | 3,913 | 607 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00024231. 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.
Has Roseburg been warmer than normal lately?
2024 averaged 57.7°F, 1.8°F above the 1991-2020 normal of 55.9°F. 4 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 57.3°F | +1.4°F | 26.03 |
| 2022 | 56.1°F | +0.2°F | 27.99 |
| 2023 | 56.7°F | +0.8°F | 28.20 |
| 2024 | 57.7°F | +1.8°F | 39.63 |
Over 58 complete years from 1931 to 2024, the station's annual mean temperature rose at a fitted 2.6°F per century (+0.14°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USW00024231; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Roseburg's climate compare?
Roseburg is warmer than 102 of the other 104 places with their own NOAA record in Oregon, and wetter than 47. Across the 7,247 U.S. stations with normals, its annual mean of 55.9°F is warmer than 63%.
In the Köppen classification computed from these normals, Roseburg is Csb: temperate, 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.
Which places near Roseburg share this climate record?
5 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Green, OR7,916 people · 6 mi S
- Winston, OR5,691 people · 9 mi SW
- Melrose, OR1,150 people · 5 mi W
- Lookingglass, OR994 people · 8 mi SW
- Dillard, OR436 people · 10 mi S
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Roseburg's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Roseburg. This page uses Roseburg Regional Airport; the other differs by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Roseburg Kqen USC00357331 | 2 mi S | 425 ft | 56.4°F | 36°F | 88°F | 33.7 | 0 | March 23 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Roseburg's climate
What is the coldest month in Roseburg?
December, with a normal high of 48°F and a normal low of 37°F. The warmest is July (86°F by day, 57°F at night).
Does it snow in Roseburg?
Rarely. NOAA publishes no 1991-2020 snowfall normal for Roseburg's NOAA station; Roseburg's own co-op station Roseburg Kqen records 0 inches of snow in a normal year.
What is the rainiest month in Roseburg?
December, with 6.05 in of precipitation in a normal year; the driest is August with 0.23 in.
What plant hardiness zone is Roseburg in?
The USDA's 2023 map puts Roseburg in zone 8b in ZIP code 97495, the nearest ZIP area. By the same method at Roseburg's NOAA station, the coldest night of a typical year reaches 22°F (23 years, 1991-2020): zone 9a.
How late can frost come in Roseburg?
In half of years the last 32°F night comes after March 19; in one year in ten it comes after April 13. Waiting until April 13 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Roseburg in OctoberThis month day by day, its records and recent years
- Oregon climateThe statewide normals and every place in the state
- Winchester, OR3 miles from this station, 54.9°F a year
- Riddle, OR20 miles from this station, 56.7°F a year
- Idleyld Park (4 mi NE), OR22 miles from this station, 52.4°F a year
- Drain, OR29 miles from this station, 54.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made