Cascade Locks, Oregon climate: Normal weather by month, frost dates and records
Cascade Locks's normal year runs from 33°F January nights to 82°F August afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.4°C, January lows of 1°C, August highs of 28°C.
- NOAA stationCascade Locks
- Station IDUSC00351407
- Location45.68°N 121.87°W
- Elevation142 ft (43 m)
- Population1,367
On October 23, the normal high in Cascade Locks is 60°F and the normal low 43°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Cascade Locks.
- Jan 42° 33°
- Feb 48° 34°
- Mar 54° 36°
- Apr 61° 41°
- May 68° 47°
- Jun 73° 52°
- Jul 80° 56°
- Aug 82° 57°
- Sep 76° 51°
- Oct 63° 45°
- Nov 50° 39°
- Dec 43° 33°
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 Cascade Locks each month?
August is the warmest month, with normal highs of 82°F; January the coldest, with normal lows of 33°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 42°F | 33°F | 37.6°F | – | <1 | 11 | 9 h |
| February | 48°F | 34°F | 40.9°F | – | <1 | 12 | 10 h 20 min |
| March | 54°F | 36°F | 45.1°F | – | <1 | 9 | 11 h 50 min |
| April | 61°F | 41°F | 50.7°F | – | <1 | 1 | 13 h 30 min |
| May | 68°F | 47°F | 57.3°F | – | <1 | <1 | 14 h 50 min |
| June | 73°F | 52°F | 62.6°F | – | 2 | <1 | 15 h 40 min |
| July | 80°F | 56°F | 68.4°F | – | 5 | <1 | 15 h 20 min |
| August | 82°F | 57°F | 69.3°F | – | 7 | <1 | 14 h 10 min |
| September | 76°F | 51°F | 63.7°F | – | 2 | <1 | 12 h 40 min |
| October | 63°F | 45°F | 53.9°F | – | <1 | 1 | 11 h |
| November | 50°F | 39°F | 44.6°F | – | <1 | 6 | 9 h 30 min |
| December | 43°F | 33°F | 37.8°F | – | <1 | 15 | 8 h 40 min |
| Year (annual) | 62°F | 44°F | 52.6°F | – | 17 | 55 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 5°C | 1°C | 3.1°C |
| February | 9°C | 1°C | 4.9°C |
| March | 12°C | 2°C | 7.3°C |
| April | 16°C | 5°C | 10.4°C |
| May | 20°C | 8°C | 14.1°C |
| June | 23°C | 11°C | 17.0°C |
| July | 27°C | 13°C | 20.2°C |
| August | 28°C | 14°C | 20.7°C |
| September | 25°C | 11°C | 17.6°C |
| October | 17°C | 7°C | 12.2°C |
| November | 10°C | 4°C | 7.0°C |
| December | 6°C | 0°C | 3.2°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Bonneville Dam (5 miles away), gets 10 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00351407; 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 Cascade Locks?
Normal highs sit between 65°F and 85°F in May, 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 USC00351407.
When is the last frost in Cascade Locks?
In Cascade Locks, the last spring frost (32°F) comes after March 24 in half of years and after April 16 in one year in ten; the first autumn frost comes before November 20 in half of years and before November 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
- March 241 year in 10 after April 16; 9 in 10 after February 28
- First autumn frost, half of years before
- November 201 year in 10 before November 1; 9 in 10 before December 12
NOAA puts the median frost-free season at 242 days, and the season without a hard freeze (28°F) at 292 days.
A hard freeze (28°F) comes after February 24 in half of springs and before December 9 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Cascade Locks in zone 8a in ZIP code 98648, 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 USC00351407; 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 Cascade Locks?
In a normal year in Cascade Locks, 17 days a year reach 90°F (1 of them 100°F or more) and 55 nights fall to 32°F or colder.
- Days at 90°F or more
- 17a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 55a normal year
- Days that stay below freezing
- 8high of 32°F or less
The highest temperature in this station's record (since 1894) is 109°F, on June 29, 2021; the lowest is −3°F, on January 30, 1950.
The wettest calendar year on that record is 1950, with 111.87 in; the snowiest season is 1949–50, with 102.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00351407; records: ACIS (NOAA Regional Climate Centers), station USC00351407. Records use complete months only; a month missing more than three days is left out.
How sunny is Cascade Locks?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Cascade Locks, 4.2 kWh per square metre a day. July is the sunniest month (93%) and December the cloudiest (56%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 57% | 1.3 |
| February | 66% | 2.3 |
| March | 68% | 3.5 |
| April | 75% | 5.1 |
| May | 78% | 6.3 |
| June | 83% | 7.1 |
| July | 93% | 7.7 |
| August | 91% | 6.5 |
| September | 86% | 4.8 |
| October | 76% | 3.0 |
| November | 64% | 1.6 |
| December | 56% | 1.1 |
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 Cascade Locks need?
A normal year in Cascade Locks brings 4,855 heating degree days, 10% fewer than the median U.S. place (5,373), and 363 cooling degree days, 60% 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 2,435 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 851 | 0 |
| February | 675 | 0 |
| March | 619 | 0 |
| April | 431 | 1 |
| May | 244 | 5 |
| June | 115 | 41 |
| July | 19 | 123 |
| August | 10 | 142 |
| September | 88 | 49 |
| October | 346 | 2 |
| November | 614 | 0 |
| December | 845 | 0 |
| Year (annual) | 4,855 | 363 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00351407. 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 Cascade Locks been warmer than normal lately?
2025 averaged 54.5°F, 1.9°F above the 1991-2020 normal of 52.6°F. 3 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal |
|---|---|---|
| 2021 | 53.8°F | +1.1°F |
| 2022 | 52.1°F | −0.5°F |
| 2023 | 53.5°F | +0.9°F |
| 2025 | 54.5°F | +1.9°F |
Source: observed years: ACIS, station USC00351407. A year counts only with all twelve months complete.
How does Cascade Locks's climate compare?
Cascade Locks is warmer than 62 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 52.6°F is warmer than 52%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Cascade Locks share this climate record?
Stevenson has no NOAA station with 1991-2020 normals of its 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.
- Stevenson, WA1,598 people · 2 mi NW
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 Cascade Locks's climate
What is the coldest month in Cascade Locks?
January, with a normal high of 42°F and a normal low of 33°F. The warmest is August (82°F by day, 57°F at night).
Does it snow in Cascade Locks?
Yes. NOAA publishes no 1991-2020 snowfall normal for Cascade Locks's NOAA station; the nearest record that keeps one, Bonneville Dam (5 miles away), records 10 inches of snow in a normal year.
What plant hardiness zone is Cascade Locks in?
The USDA's 2023 map puts Cascade Locks in zone 8a in ZIP code 98648, the nearest ZIP area.
How late can frost come in Cascade Locks?
In half of years the last 32°F night comes after March 24; in one year in ten it comes after April 16. Waiting until April 16 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Oregon climateThe statewide normals and every place in the state
- Bonneville Dam, OR5 miles from this station, 52.8°F a year
- Carson, WA14 miles from this station, 48.3°F a year
- Parkdale, OR17 miles from this station, 47.8°F a year
- Skamania Fish Hatchery, WA17 miles from this station, 50.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made