Winchester Bay, Oregon climate: Normal weather by month, frost dates and records
Winchester Bay's normal year runs from 39°F December nights to 70°F August afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.7°C, December lows of 4°C, August highs of 21°C.
- NOAA stationWinchester Bay Coast Guard
- Station IDUSC00353193
- Location43.68°N 124.18°W
- Elevation8 ft (2 m)
- Population (census place)184
On October 14, the normal high in Winchester Bay is 65°F and the normal low 46°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Winchester Bay.
- Jan 54° 39°
- Feb 55° 39°
- Mar 56° 40°
- Apr 59° 42°
- May 63° 46°
- Jun 66° 49°
- Jul 70° 52°
- Aug 70° 52°
- Sep 71° 50°
- Oct 65° 46°
- Nov 58° 42°
- Dec 53° 39°
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 Winchester Bay each month?
August is the warmest month, with normal highs of 70°F; December the coldest, with normal lows of 39°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 54°F | 39°F | 46.6°F | – | <1 | 5 | 9 h 20 min |
| February | 55°F | 39°F | 47.0°F | – | <1 | 3 | 10 h 30 min |
| March | 56°F | 40°F | 48.0°F | – | <1 | 3 | 11 h 50 min |
| April | 59°F | 42°F | 50.4°F | – | <1 | 1 | 13 h 20 min |
| May | 63°F | 46°F | 54.2°F | – | <1 | <1 | 14 h 40 min |
| June | 66°F | 49°F | 57.5°F | – | <1 | <1 | 15 h 30 min |
| July | 70°F | 52°F | 60.7°F | – | <1 | <1 | 15 h 10 min |
| August | 70°F | 52°F | 61.1°F | – | <1 | <1 | 14 h |
| September | 71°F | 50°F | 60.4°F | – | 1 | <1 | 12 h 30 min |
| October | 65°F | 46°F | 55.2°F | – | <1 | <1 | 11 h 10 min |
| November | 58°F | 42°F | 49.9°F | – | <1 | 2 | 9 h 40 min |
| December | 53°F | 39°F | 46.1°F | – | <1 | 5 | 9 h |
| Year (annual) | 62°F | 45°F | 53.1°F | – | 1 | 19 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 12°C | 4°C | 8.1°C |
| February | 13°C | 4°C | 8.3°C |
| March | 14°C | 4°C | 8.9°C |
| April | 15°C | 5°C | 10.2°C |
| May | 17°C | 8°C | 12.3°C |
| June | 19°C | 10°C | 14.2°C |
| July | 21°C | 11°C | 15.9°C |
| August | 21°C | 11°C | 16.2°C |
| September | 22°C | 10°C | 15.8°C |
| October | 18°C | 8°C | 12.9°C |
| November | 14°C | 6°C | 9.9°C |
| December | 12°C | 4°C | 7.8°C |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00353193; 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 Winchester Bay?
Normal highs sit between 65°F and 85°F in June, July, August and September.
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 USC00353193.
When is the last frost in Winchester Bay?
In Winchester Bay, the last spring frost (32°F) comes after March 25 in half of years and after April 27 in one year in ten; the first autumn frost comes before November 24 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 251 year in 10 after April 27; 9 in 10 after February 15
- First autumn frost, half of years before
- November 241 year in 10 before October 27; 9 in 10 before January 1
NOAA puts the median frost-free season at 249 days, and the season without a hard freeze (28°F) at 314 days.
A hard freeze (28°F) comes after February 17 in half of springs and before December 26 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Winchester Bay in zone 9a in ZIP code 97441, 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 USC00353193; 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 in Winchester Bay?
In a normal year in Winchester Bay, 1 day a year reaches 90°F and 19 nights fall to 32°F or colder.
- Days at 90°F or more
- 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 19a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00353193.
How sunny is Winchester Bay?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Winchester Bay, 3.9 kWh per square metre a day. July is the sunniest month (81%) and December the cloudiest (58%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 61% | 1.5 |
| February | 64% | 2.3 |
| March | 65% | 3.4 |
| April | 69% | 4.8 |
| May | 73% | 5.9 |
| June | 75% | 6.4 |
| July | 81% | 6.6 |
| August | 79% | 5.6 |
| September | 78% | 4.5 |
| October | 72% | 2.9 |
| November | 63% | 1.7 |
| December | 58% | 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 Winchester Bay need?
A normal year in Winchester Bay brings 4,355 heating degree days, 19% fewer than the median U.S. place (5,373), and 24 cooling degree days, 97% 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 1,733 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 570 | 0 |
| February | 503 | 0 |
| March | 529 | 0 |
| April | 438 | 0 |
| May | 334 | 1 |
| June | 226 | 1 |
| July | 137 | 4 |
| August | 124 | 5 |
| September | 148 | 10 |
| October | 305 | 2 |
| November | 455 | 0 |
| December | 586 | 0 |
| Year (annual) | 4,355 | 24 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00353193. 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 Winchester Bay's climate compare?
Winchester Bay is warmer than 71 of the other 104 places with their own NOAA record in Oregon. Across the 7,247 U.S. stations with normals, its annual mean of 53.1°F is warmer than 54%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Winchester Bay share this climate record?
3 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.
- Reedsport, OR4,299 people · 4 mi E
- Lakeside, OR1,858 people · 7 mi S
- Gardiner, OR351 people · 5 mi NE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Winchester Bay's climate
What is the coldest month in Winchester Bay?
December, with a normal high of 53°F and a normal low of 39°F. The warmest is August (70°F by day, 52°F at night).
What plant hardiness zone is Winchester Bay in?
The USDA's 2023 map puts Winchester Bay in zone 9a in ZIP code 97441, the nearest ZIP area.
How late can frost come in Winchester Bay?
In half of years the last 32°F night comes after March 25; in one year in ten it comes after April 27. Waiting until April 27 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Oregon climateThe statewide normals and every place in the state
- Honeyman State Park, OR17 miles from this station, 50.9°F a year
- North Bend, OR19 miles from this station, 53.0°F a year
- Florence, OR22 miles from this station, 50.3°F a year
- Mapleton, OR29 miles from this station, 55.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made