McCammon, Idaho climate: Normal weather by month, frost dates and records
McCammon's normal year runs from 15°F January nights to 87°F July afternoons, with 15.5 inches of precipitation and 45 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.8°C, January lows of −10°C, July highs of 31°C, 393 mm of precipitation a year.
- NOAA stationMcCammon
- Station IDUSC00105716
- Location42.65°N 112.19°W
- Elevation4,770 ft (1,454 m)
- Population824
On October 22, the normal high in McCammon is 58°F and the normal low 30°F, and the chance of measurable rain or snow is 21%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for McCammon.
- Jan 32° 15°
- Feb 37° 18°
- Mar 49° 26°
- Apr 58° 32°
- May 68° 39°
- Jun 77° 46°
- Jul 87° 52°
- Aug 86° 51°
- Sep 76° 42°
- Oct 61° 32°
- Nov 46° 24°
- Dec 34° 17°
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 McCammon each month?
July is the warmest month, with normal highs of 87°F; January the coldest, with normal lows of 15°F. The most precipitation falls in May (2.01 in), the least in July (0.60 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 32°F | 15°F | 23.4°F | 1.80 | 16.8 | 11 | <1 | 30 | 9 h 20 min |
| February | 37°F | 18°F | 27.7°F | 1.32 | 7.0 | 9 | <1 | 26 | 10 h 30 min |
| March | 49°F | 26°F | 37.4°F | 1.24 | 3.5 | 9 | <1 | 25 | 11 h 50 min |
| April | 58°F | 32°F | 45.3°F | 1.19 | 1.6 | 9 | <1 | 16 | 13 h 20 min |
| May | 68°F | 39°F | 53.7°F | 2.01 | 0.1 | 9 | <1 | 6 | 14 h 40 min |
| June | 77°F | 46°F | 61.5°F | 1.17 | 0.0 | 7 | 2 | 1 | 15 h 20 min |
| July | 87°F | 52°F | 69.6°F | 0.60 | 0.0 | 4 | 13 | <1 | 15 h |
| August | 86°F | 51°F | 68.1°F | 1.04 | 0.0 | 5 | 10 | <1 | 14 h |
| September | 76°F | 42°F | 59.1°F | 1.24 | 0.0 | 5 | 1 | 3 | 12 h 30 min |
| October | 61°F | 32°F | 46.8°F | 1.15 | 0.6 | 7 | <1 | 17 | 11 h 10 min |
| November | 46°F | 24°F | 34.8°F | 0.97 | 2.2 | 8 | <1 | 26 | 9 h 50 min |
| December | 34°F | 17°F | 25.3°F | 1.73 | 12.9 | 12 | <1 | 30 | 9 h |
| Year (annual) | 59°F | 33°F | 46.1°F | 15.46 | 44.7 | 94 | 26 | 179 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 0°C | −10°C | −4.8°C | 46 mm | 43 cm |
| February | 3°C | −8°C | −2.4°C | 34 mm | 18 cm |
| March | 9°C | −3°C | 3.0°C | 31 mm | 9 cm |
| April | 15°C | 0°C | 7.4°C | 30 mm | 4 cm |
| May | 20°C | 4°C | 12.1°C | 51 mm | 0 cm |
| June | 25°C | 8°C | 16.4°C | 30 mm | 0 cm |
| July | 31°C | 11°C | 20.9°C | 15 mm | 0 cm |
| August | 30°C | 10°C | 20.1°C | 26 mm | 0 cm |
| September | 24°C | 6°C | 15.1°C | 31 mm | 0 cm |
| October | 16°C | 0°C | 8.2°C | 29 mm | 2 cm |
| November | 8°C | −4°C | 1.6°C | 25 mm | 6 cm |
| December | 1°C | −8°C | −3.7°C | 44 mm | 33 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00105716; 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 McCammon?
Normal highs sit between 65°F and 85°F in May, June and September. 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 USC00105716.
When is the last frost in McCammon?
In McCammon, the last spring frost (32°F) comes after May 23 in half of years and after June 10 in one year in ten; the first autumn frost comes before September 24 in half of years and before September 7 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 231 year in 10 after June 10; 9 in 10 after May 6
- First autumn frost, half of years before
- September 241 year in 10 before September 7; 9 in 10 before October 7
NOAA puts the median frost-free season at 121 days, and the season without a hard freeze (28°F) at 152 days.
A hard freeze (28°F) comes after May 4 in half of springs and before October 4 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts McCammon in zone 5b in ZIP code 83250, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, McCammon's NOAA station is in zone 6a: the coldest night of a typical year reaches −10°F (18 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 USC00105716; 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 McCammon?
In a normal year in McCammon, 26 days a year reach 90°F, 179 nights fall to 32°F or colder and 94 days bring measurable precipitation.
- Days at 90°F or more
- 26a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 179a normal year
- Days that stay below freezing
- 39high of 32°F or less
- Days with 0.01 inch of precipitation
- 94a normal year
- Days with 1 inch of snow or more
- 18a normal year
The highest temperature in this station's record (since 1949) is 103°F, on July 10, 1956; the lowest is −31°F, on December 23, 1990.
The wettest calendar year on that record is 1996, with 26.39 in; the snowiest season is 1992–93, with 116.8 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00105716; records: ACIS (NOAA Regional Climate Centers), station USC00105716. Records use complete months only; a month missing more than three days is left out.
How sunny is McCammon?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around McCammon, 4.5 kWh per square metre a day. July is the sunniest month (88%) and December the cloudiest (60%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 67% | 1.9 |
| February | 68% | 2.8 |
| March | 71% | 4.0 |
| April | 72% | 5.3 |
| May | 77% | 6.5 |
| June | 84% | 7.5 |
| July | 88% | 7.5 |
| August | 88% | 6.6 |
| September | 85% | 5.2 |
| October | 79% | 3.5 |
| November | 69% | 2.1 |
| December | 60% | 1.5 |
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 McCammon need?
A normal year in McCammon brings 7,219 heating degree days, 34% more than the median U.S. place (5,373), and 348 cooling degree days, 62% 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 2,057 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,290 | 0 |
| February | 1,044 | 0 |
| March | 854 | 0 |
| April | 591 | 0 |
| May | 353 | 3 |
| June | 142 | 37 |
| July | 19 | 163 |
| August | 31 | 128 |
| September | 195 | 17 |
| October | 563 | 0 |
| November | 906 | 0 |
| December | 1,231 | 0 |
| Year (annual) | 7,219 | 348 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00105716. 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 McCammon been warmer than normal lately?
2022 averaged 44.6°F, 1.5°F below the 1991-2020 normal of 46.1°F. 1 of the 2 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 47.7°F | +1.6°F | – | – |
| 2022 | 44.6°F | −1.5°F | 12.52 | – |
Source: observed years: ACIS, station USC00105716. A year counts only with all twelve months complete.
How does McCammon's climate compare?
McCammon is warmer than 37 of the other 84 places with their own NOAA record in Idaho, and wetter than 42. Across the 7,247 U.S. stations with normals, its annual mean of 46.1°F is warmer than 24%.
In the Köppen classification computed from these normals, McCammon 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.
Which places near McCammon share this climate record?
2 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.
- Inkom, ID843 people · 10 mi N
- Arimo, ID363 people · 6 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.
Questions about McCammon's climate
What is the coldest month in McCammon?
January, with a normal high of 32°F and a normal low of 15°F. The warmest is July (87°F by day, 52°F at night).
Does it snow in McCammon?
Yes: 45 inches in a normal year, falling on 25 days with 0.1 inch or more, the most in January (16.8 inches).
What is the rainiest month in McCammon?
May, with 2.01 in of precipitation in a normal year; the driest is July with 0.60 in.
What plant hardiness zone is McCammon in?
The USDA's 2023 map puts McCammon in zone 5b in ZIP code 83250, the nearest ZIP area. By the same method at McCammon's NOAA station, the coldest night of a typical year reaches −10°F (18 years, 1991-2020): zone 6a.
How late can frost come in McCammon?
In half of years the last 32°F night comes after May 23; in one year in ten it comes after June 10. Waiting until June 10 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Idaho climateThe statewide normals and every place in the state
- Lava Hot Springs, ID10 miles from this station, 45.0°F a year
- Downey, ID16 miles from this station, 45.6°F a year
- Grace, ID24 miles from this station, 43.7°F a year
- Pocatello, ID27 miles from this station, 47.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made