Cascade, Idaho climate: Normal weather by month, frost dates and records
Cascade's normal year runs from 15°F January nights to 82°F July afternoons, with 23.8 inches of precipitation and 86 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.3°C, January lows of −10°C, July highs of 28°C, 603 mm of precipitation a year.
- NOAA stationCascade (1 mi NW)
- Station IDUSC00101514
- Location44.52°N 116.05°W
- Elevation4,896 ft (1,492 m)
- Population1,026
On October 22, the normal high in Cascade is 55°F and the normal low 30°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 Cascade.
- Jan 32° 15°
- Feb 37° 17°
- Mar 45° 24°
- Apr 53° 30°
- May 63° 37°
- Jun 70° 43°
- Jul 82° 48°
- Aug 82° 47°
- Sep 73° 40°
- Oct 58° 31°
- Nov 42° 25°
- Dec 32° 16°
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 each month?
July is the warmest month, with normal highs of 82°F; January the coldest, with normal lows of 15°F. The most precipitation falls in December (3.51 in), the least in August (0.44 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 32°F | 15°F | 23.2°F | 2.96 | 21.8 | 15 | <1 | 31 | 9 h 10 min |
| February | 37°F | 17°F | 27.2°F | 2.45 | 14.1 | 12 | <1 | 27 | 10 h 30 min |
| March | 45°F | 24°F | 34.3°F | 2.63 | 9.2 | 14 | <1 | 29 | 11 h 50 min |
| April | 53°F | 30°F | 41.2°F | 2.05 | 3.3 | 13 | <1 | 26 | 13 h 30 min |
| May | 63°F | 37°F | 50.0°F | 2.13 | 0.4 | 13 | <1 | 14 | 14 h 50 min |
| June | 70°F | 43°F | 56.7°F | 1.77 | 0.1 | 11 | <1 | 5 | 15 h 30 min |
| July | 82°F | 48°F | 65.2°F | 0.50 | 0.0 | 4 | 5 | 1 | 15 h 10 min |
| August | 82°F | 47°F | 64.4°F | 0.44 | 0.0 | 4 | 4 | 1 | 14 h 10 min |
| September | 73°F | 40°F | 56.0°F | 0.99 | 0.0 | 6 | <1 | 10 | 12 h 40 min |
| October | 58°F | 31°F | 44.6°F | 1.71 | 0.9 | 10 | <1 | 23 | 11 h |
| November | 42°F | 25°F | 33.1°F | 2.61 | 10.1 | 14 | <1 | 28 | 9 h 40 min |
| December | 32°F | 16°F | 23.8°F | 3.51 | 26.4 | 16 | <1 | 30 | 8 h 50 min |
| Year (annual) | 56°F | 31°F | 43.3°F | 23.75 | 86.3 | 132 | 9 | 225 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 0°C | −10°C | −4.9°C | 75 mm | 55 cm |
| February | 3°C | −8°C | −2.7°C | 62 mm | 36 cm |
| March | 7°C | −5°C | 1.3°C | 67 mm | 23 cm |
| April | 12°C | −1°C | 5.1°C | 52 mm | 8 cm |
| May | 17°C | 3°C | 10.0°C | 54 mm | 1 cm |
| June | 21°C | 6°C | 13.7°C | 45 mm | 0 cm |
| July | 28°C | 9°C | 18.4°C | 13 mm | 0 cm |
| August | 28°C | 8°C | 18.0°C | 11 mm | 0 cm |
| September | 23°C | 4°C | 13.3°C | 25 mm | 0 cm |
| October | 14°C | 0°C | 7.0°C | 43 mm | 2 cm |
| November | 5°C | −4°C | 0.6°C | 66 mm | 26 cm |
| December | 0°C | −9°C | −4.6°C | 89 mm | 67 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00101514; 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?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, August 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 USC00101514.
When is the last frost in Cascade?
In Cascade, the last spring frost (32°F) comes after May 30 in half of years and after June 21 in one year in ten; the first autumn frost comes before September 19 in half of years and before September 3 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
- May 301 year in 10 after June 21; 9 in 10 after May 10
- First autumn frost, half of years before
- September 191 year in 10 before September 3; 9 in 10 before October 4
NOAA puts the median frost-free season at 110 days, and the season without a hard freeze (28°F) at 147 days.
A hard freeze (28°F) comes after May 6 in half of springs and before October 2 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Cascade in zone 5a in ZIP code 83615, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Cascade's NOAA station is in zone 5b: the coldest night of a typical year reaches −15°F (19 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 Idaho · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00101514; 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 Cascade?
In a normal year in Cascade, 9 days a year reach 90°F, 225 nights fall to 32°F or colder and 132 days bring measurable precipitation.
- Days at 90°F or more
- 9a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 225a normal year
- Days that stay below freezing
- 46high of 32°F or less
- Days with 0.01 inch of precipitation
- 132a normal year
- Days with 1 inch of snow or more
- 29a normal year
The highest temperature in this station's record (since 1942) is 103°F, on July 6, 2007; the lowest is −40°F, on January 18, 1943.
The wettest calendar year on that record is 1982, with 32.95 in; the snowiest season is 1949–50, with 166.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00101514; records: ACIS (NOAA Regional Climate Centers), station USC00101514. Records use complete months only; a month missing more than three days is left out.
How sunny is Cascade?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Cascade, 4.4 kWh per square metre a day. July is the sunniest month (92%) and December the cloudiest (57%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 61% | 1.6 |
| February | 66% | 2.5 |
| March | 66% | 3.6 |
| April | 74% | 5.3 |
| May | 78% | 6.5 |
| June | 82% | 7.3 |
| July | 92% | 7.8 |
| August | 91% | 6.6 |
| September | 86% | 5.0 |
| October | 78% | 3.2 |
| November | 66% | 1.8 |
| December | 57% | 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 Cascade need?
A normal year in Cascade brings 8,040 heating degree days, 50% more than the median U.S. place (5,373), and 160 cooling degree days, 82% 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 1,489 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,296 | 0 |
| February | 1,057 | 0 |
| March | 952 | 0 |
| April | 713 | 0 |
| May | 466 | 1 |
| June | 263 | 13 |
| July | 73 | 80 |
| August | 80 | 60 |
| September | 275 | 6 |
| October | 633 | 0 |
| November | 957 | 0 |
| December | 1,277 | 0 |
| Year (annual) | 8,040 | 160 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00101514. 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 been warmer than normal lately?
Over 58 complete years from 1943 to 2016, the station's annual mean temperature rose at a fitted 0.6°F per century (+0.03°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Cascade's climate compare?
Cascade is warmer than 16 of the other 84 places with their own NOAA record in Idaho, and wetter than 64. Across the 7,247 U.S. stations with normals, its annual mean of 43.3°F is warmer than 13%.
In the Köppen classification computed from these normals, Cascade 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 Cascade's climate
What is the coldest month in Cascade?
January, with a normal high of 32°F and a normal low of 15°F. The warmest is July (82°F by day, 48°F at night).
Does it snow in Cascade?
Yes: 86 inches in a normal year, falling on 45 days with 0.1 inch or more, the most in December (26.4 inches).
What is the rainiest month in Cascade?
December, with 3.51 in of precipitation in a normal year; the driest is August with 0.44 in.
What plant hardiness zone is Cascade in?
The USDA's 2023 map puts Cascade in zone 5a in ZIP code 83615, the nearest ZIP area. By the same method at Cascade's NOAA station, the coldest night of a typical year reaches −15°F (19 years, 1991-2020): zone 5b.
How late can frost come in Cascade?
In half of years the last 32°F night comes after May 30; in one year in ten it comes after June 21. Waiting until June 21 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Idaho climateThe statewide normals and every place in the state
- Deadwood Lodge, ID24 miles from this station, 39.3°F a year
- Council, ID24 miles from this station, 49.2°F a year
- McCall, ID25 miles from this station, 41.5°F a year
- Ola, ID27 miles from this station, 47.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made