Lost Creek Dam, Oregon climate: Climate normals at a NOAA weather station
Lost Creek Dam's normal year runs from 31°F December nights to 90°F July afternoons, with 33.1 inches of precipitation and 1 inch of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 12.0°C, December lows of −1°C, July highs of 32°C, 840 mm of precipitation a year.
- NOAA stationLost Creek Dam
- Station IDUSC00355055
- Location42.67°N 122.67°W
- Elevation1,580 ft (482 m)
On October 23, the normal high in Lost Creek Dam is 66°F and the normal low 36°F, and the chance of measurable rain or snow is 34%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Lost Creek Dam.
- Jan 49° 31°
- Feb 54° 31°
- Mar 59° 34°
- Apr 64° 37°
- May 72° 43°
- Jun 80° 47°
- Jul 90° 52°
- Aug 91° 51°
- Sep 84° 45°
- Oct 70° 38°
- Nov 55° 34°
- Dec 47° 31°
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 Lost Creek Dam each month?
July is the warmest month, with normal highs of 90°F; December the coldest, with normal lows of 31°F. The most precipitation falls in December (6.33 in), the least in August (0.33 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 49°F | 31°F | 39.9°F | 4.93 | 0.1 | 17 | <1 | 21 | 9 h 20 min |
| February | 54°F | 31°F | 42.6°F | 3.43 | 0.1 | 14 | <1 | 19 | 10 h 30 min |
| March | 59°F | 34°F | 46.2°F | 3.54 | 0.0 | 15 | <1 | 16 | 11 h 50 min |
| April | 64°F | 37°F | 50.4°F | 2.92 | 0.0 | 14 | <1 | 9 | 13 h 20 min |
| May | 72°F | 43°F | 57.5°F | 2.03 | 0.0 | 10 | 2 | 2 | 14 h 40 min |
| June | 80°F | 47°F | 63.3°F | 1.13 | 0.0 | 6 | 5 | <1 | 15 h 20 min |
| July | 90°F | 52°F | 71.2°F | 0.44 | 0.0 | 2 | 18 | <1 | 15 h |
| August | 91°F | 51°F | 70.9°F | 0.33 | 0.0 | 2 | 19 | <1 | 14 h |
| September | 84°F | 45°F | 64.9°F | 0.79 | 0.0 | 4 | 11 | 1 | 12 h 30 min |
| October | 70°F | 38°F | 54.0°F | 2.35 | 0.0 | 9 | 1 | 7 | 11 h 10 min |
| November | 55°F | 34°F | 44.3°F | 4.85 | 0.0 | 16 | <1 | 15 | 9 h 50 min |
| December | 47°F | 31°F | 38.9°F | 6.33 | 1.1 | 18 | <1 | 20 | 9 h |
| Year (annual) | 68°F | 40°F | 53.6°F | 33.07 | 1.3 | 127 | 57 | 109 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 9°C | −1°C | 4.4°C | 125 mm | 0 cm |
| February | 12°C | 0°C | 5.9°C | 87 mm | 0 cm |
| March | 15°C | 1°C | 7.9°C | 90 mm | 0 cm |
| April | 18°C | 3°C | 10.2°C | 74 mm | 0 cm |
| May | 22°C | 6°C | 14.2°C | 52 mm | 0 cm |
| June | 27°C | 8°C | 17.4°C | 29 mm | 0 cm |
| July | 32°C | 11°C | 21.8°C | 11 mm | 0 cm |
| August | 33°C | 11°C | 21.6°C | 8 mm | 0 cm |
| September | 29°C | 7°C | 18.3°C | 20 mm | 0 cm |
| October | 21°C | 3°C | 12.2°C | 60 mm | 0 cm |
| November | 13°C | 1°C | 6.8°C | 123 mm | 0 cm |
| December | 8°C | −1°C | 3.8°C | 161 mm | 3 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00355055; 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 Lost Creek Dam?
Normal highs sit between 65°F and 85°F in May, June, September and October. Of those, September has the fewest days with rain (4).
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 USC00355055.
When is the last frost at Lost Creek Dam?
In Lost Creek Dam, the last spring frost (32°F) comes after April 29 in half of years and after May 19 in one year in ten; the first autumn frost comes before October 17 in half of years and before October 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
- April 291 year in 10 after May 19; 9 in 10 after April 7
- First autumn frost, half of years before
- October 171 year in 10 before October 1; 9 in 10 before November 1
NOAA puts the median frost-free season at 171 days, and the season without a hard freeze (28°F) at 216 days.
A hard freeze (28°F) comes after March 31 in half of springs and before November 1 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Lost Creek Dam in zone 8a in ZIP code 97541, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 8a: the coldest night of a typical year reaches 15°F (29 complete years).
Frost dates for every NOAA station in Oregon · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00355055; 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 at Lost Creek Dam?
In a normal year in Lost Creek Dam, 57 days a year reach 90°F (9 of them 100°F or more), 109 nights fall to 32°F or colder and 127 days bring measurable precipitation.
- Days at 90°F or more
- 57a normal year
- Days at 100°F or more
- 9a normal year
- Nights at 32°F or colder
- 109a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 127a normal year
- Days with 1 inch of snow or more
- 1a normal year
The highest temperature in this station's record (since 1970) is 114°F, on June 29, 2021; the lowest is −10°F, on December 11, 1972.
The wettest calendar year on that record is 1996, with 52.92 in; the snowiest season is 1970–71, with 30.8 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00355055; records: ACIS (NOAA Regional Climate Centers), station USC00355055. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Lost Creek Dam?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds at Lost Creek Dam, 4.5 kWh per square metre a day. July is the sunniest month (94%) and December the cloudiest (59%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 63% | 1.7 |
| February | 67% | 2.6 |
| March | 67% | 3.7 |
| April | 71% | 5.2 |
| May | 78% | 6.5 |
| June | 86% | 7.6 |
| July | 94% | 8.0 |
| August | 93% | 6.9 |
| September | 89% | 5.3 |
| October | 80% | 3.5 |
| November | 66% | 2.0 |
| December | 59% | 1.4 |
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 Lost Creek Dam record?
A normal year at Lost Creek Dam brings 4,683 heating degree days, 13% fewer than the median U.S. place (5,373), and 564 cooling degree days, 38% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,697 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 780 | 0 |
| February | 629 | 0 |
| March | 584 | 0 |
| April | 438 | 2 |
| May | 251 | 17 |
| June | 109 | 57 |
| July | 15 | 206 |
| August | 15 | 196 |
| September | 86 | 81 |
| October | 345 | 6 |
| November | 622 | 0 |
| December | 809 | 0 |
| Year (annual) | 4,683 | 564 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00355055. 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.
Have recent years at Lost Creek Dam been warmer than normal?
2025 averaged 55.4°F, 1.8°F above the 1991-2020 normal of 53.6°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 53.9°F | +0.3°F | 25.61 | – |
| 2022 | 54.1°F | +0.5°F | 25.49 | – |
| 2023 | 53.9°F | +0.3°F | 24.17 | 9.6 |
| 2024 | 54.8°F | +1.2°F | 38.51 | 4.9 |
| 2025 | 55.4°F | +1.8°F | 30.87 | 5.1 |
Over 48 complete years from 1971 to 2025, the station's annual mean temperature rose at a fitted 5.1°F per century (+0.28°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00355055; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Lost Creek Dam's climate compare?
Lost Creek Dam is warmer than 80 of the 105 places with their own NOAA record in Oregon, and wetter than 48. Across the 7,247 U.S. stations with normals, its annual mean of 53.6°F is warmer than 55%.
In the Köppen classification computed from these normals, Lost Creek Dam 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 Lost Creek Dam 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.
- Shady Cove, OR3,042 people · 9 mi SW
- Trail, OR652 people · 7 mi W
- Butte Falls, OR433 people · 11 mi SE
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 Lost Creek Dam's climate
What is the coldest month at Lost Creek Dam?
December, with a normal high of 47°F and a normal low of 31°F. The warmest is July (90°F by day, 52°F at night).
Does it snow at Lost Creek Dam?
Yes: 1 inch in a normal year, falling on 1 days with 0.1 inch or more, the most in December (1.1 inches).
What is the rainiest month at Lost Creek Dam?
December, with 6.33 in of precipitation in a normal year; the driest is August with 0.33 in.
What plant hardiness zone is Lost Creek Dam in?
The USDA's 2023 map puts Lost Creek Dam in zone 8a in ZIP code 97541, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 15°F (29 years, 1991-2020): zone 8a.
How late can frost come at Lost Creek Dam?
In half of years the last 32°F night comes after April 29; in one year in ten it comes after May 19. Waiting until May 19 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Oregon climateThe statewide normals and every place in the state
- Prospect, OR9 miles from this station, 52.7°F a year
- Medford, OR22 miles from this station, 55.9°F a year
- Crater Lake NPS Headquarters, OR32 miles from this station, 37.9°F a year
- Ashland, OR32 miles from this station, 52.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made