Idaho Falls - Kifi, Idaho climate: Climate normals at a NOAA weather station
Idaho Falls - Kifi's normal year runs from 16°F January nights to 86°F July afternoons, with 13.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.1°C, January lows of −9°C, July highs of 30°C, 343 mm of precipitation a year.
- NOAA stationIdaho Falls - Kifi
- Station IDUSC00104455
- Location43.51°N 112.01°W
- Elevation4,742 ft (1,445 m)
On October 22, the normal high in Idaho Falls - Kifi is 56°F and the normal low 33°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 Idaho Falls - Kifi.
- Jan 30° 16°
- Feb 36° 20°
- Mar 48° 29°
- Apr 58° 34°
- May 67° 42°
- Jun 77° 49°
- Jul 86° 55°
- Aug 86° 54°
- Sep 75° 45°
- Oct 59° 35°
- Nov 43° 25°
- Dec 31° 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 at Idaho Falls - Kifi each month?
July is the warmest month, with normal highs of 86°F; January the coldest, with normal lows of 16°F. The most precipitation falls in May (1.93 in), the least in July (0.51 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 30°F | 16°F | 23.2°F | 1.06 | 11 | <1 | 30 | 9 h 20 min |
| February | 36°F | 20°F | 27.9°F | 0.95 | 9 | <1 | 26 | 10 h 30 min |
| March | 48°F | 29°F | 38.4°F | 1.26 | 9 | <1 | 23 | 11 h 50 min |
| April | 58°F | 34°F | 46.0°F | 1.43 | 10 | <1 | 14 | 13 h 20 min |
| May | 67°F | 42°F | 54.8°F | 1.93 | 10 | <1 | 3 | 14 h 40 min |
| June | 77°F | 49°F | 62.6°F | 1.25 | 6 | 3 | 1 | 15 h 20 min |
| July | 86°F | 55°F | 70.8°F | 0.51 | 4 | 13 | <1 | 15 h 10 min |
| August | 86°F | 54°F | 69.5°F | 0.65 | 5 | 11 | <1 | 14 h |
| September | 75°F | 45°F | 60.1°F | 1.13 | 5 | 1 | 2 | 12 h 30 min |
| October | 59°F | 35°F | 47.1°F | 1.23 | 7 | <1 | 14 | 11 h 10 min |
| November | 43°F | 25°F | 34.1°F | 0.95 | 8 | <1 | 25 | 9 h 40 min |
| December | 31°F | 17°F | 24.0°F | 1.14 | 11 | <1 | 30 | 9 h |
| Year (annual) | 58°F | 35°F | 46.5°F | 13.49 | 95 | 28 | 166 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −1°C | −9°C | −4.9°C | 27 mm |
| February | 2°C | −7°C | −2.3°C | 24 mm |
| March | 9°C | −2°C | 3.6°C | 32 mm |
| April | 14°C | 1°C | 7.8°C | 36 mm |
| May | 20°C | 6°C | 12.7°C | 49 mm |
| June | 25°C | 9°C | 17.0°C | 32 mm |
| July | 30°C | 13°C | 21.6°C | 13 mm |
| August | 30°C | 12°C | 20.8°C | 17 mm |
| September | 24°C | 7°C | 15.6°C | 29 mm |
| October | 15°C | 2°C | 8.4°C | 31 mm |
| November | 6°C | −4°C | 1.2°C | 24 mm |
| December | −1°C | −8°C | −4.4°C | 29 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Idaho Falls (16 mi SE) (16 miles away), gets 66 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00104455; 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 Idaho Falls - Kifi?
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 USC00104455.
When is the last frost at Idaho Falls - Kifi?
In Idaho Falls - Kifi, the last spring frost (32°F) comes after May 9 in half of years and after June 2 in one year in ten; the first autumn frost comes before October 1 in half of years and before September 17 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 91 year in 10 after June 2; 9 in 10 after April 27
- First autumn frost, half of years before
- October 11 year in 10 before September 17; 9 in 10 before October 15
NOAA puts the median frost-free season at 142 days, and the season without a hard freeze (28°F) at 168 days.
A hard freeze (28°F) comes after April 28 in half of springs and before October 13 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Idaho Falls - Kifi in zone 5b in ZIP code 83404, 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 6a: the coldest night of a typical year reaches −10°F (25 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 USC00104455; 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 Idaho Falls - Kifi?
In a normal year in Idaho Falls - Kifi, 28 days a year reach 90°F (1 of them 100°F or more), 166 nights fall to 32°F or colder and 95 days bring measurable precipitation.
- Days at 90°F or more
- 28a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 166a normal year
- Days that stay below freezing
- 45high of 32°F or less
- Days with 0.01 inch of precipitation
- 95a normal year
The highest temperature in this station's record (since 1952) is 104°F, on July 13, 2002; the lowest is −34°F, on February 1, 1985.
The wettest calendar year on that record is 1986, with 16.26 in; the snowiest season is 2022–23, with 77.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00104455; records: ACIS (NOAA Regional Climate Centers), station USC00104455. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Idaho Falls - Kifi?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds at Idaho Falls - Kifi, 4.5 kWh per square metre a day. July is the sunniest month (90%) and December the cloudiest (60%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 65% | 1.8 |
| February | 68% | 2.7 |
| March | 73% | 4.1 |
| April | 76% | 5.5 |
| May | 79% | 6.6 |
| June | 85% | 7.5 |
| July | 90% | 7.6 |
| August | 89% | 6.6 |
| September | 87% | 5.1 |
| October | 80% | 3.5 |
| November | 72% | 2.1 |
| December | 60% | 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 Idaho Falls - Kifi record?
A normal year at Idaho Falls - Kifi brings 7,144 heating degree days, 33% more than the median U.S. place (5,373), and 443 cooling degree days, 51% 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 2,241 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,297 | 0 |
| February | 1,040 | 0 |
| March | 826 | 0 |
| April | 569 | 0 |
| May | 323 | 6 |
| June | 122 | 52 |
| July | 17 | 195 |
| August | 21 | 162 |
| September | 176 | 29 |
| October | 555 | 0 |
| November | 929 | 0 |
| December | 1,271 | 0 |
| Year (annual) | 7,144 | 443 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00104455. 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 Idaho Falls - Kifi been warmer than normal?
2025 averaged 49.3°F, 2.8°F above the 1991-2020 normal of 46.5°F. 2 of the 3 complete years since 2022 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2022 | 44.4°F | −2.1°F | 10.87 |
| 2024 | 48.8°F | +2.3°F | 12.21 |
| 2025 | 49.3°F | +2.8°F | 10.38 |
Source: observed years: ACIS, station USC00104455. A year counts only with all twelve months complete.
How does Idaho Falls - Kifi's climate compare?
Idaho Falls - Kifi is warmer than 42 of the 85 places with their own NOAA record in Idaho, and wetter than 39. Across the 7,247 U.S. stations with normals, its annual mean of 46.5°F is warmer than 25%.
In the Köppen classification computed from these normals, Idaho Falls - Kifi is Dfb: continental, no dry season, 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 Idaho Falls - Kifi share this climate record?
4 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.
- Ammon, ID20,095 people · 4 mi SE
- Lincoln, ID3,759 people · 2 mi E
- Iona, ID3,113 people · 4 mi E
- Ucon, ID1,218 people · 6 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 Idaho Falls - Kifi's climate
What is the coldest month at Idaho Falls - Kifi?
January, with a normal high of 30°F and a normal low of 16°F. The warmest is July (86°F by day, 55°F at night).
Does it snow at Idaho Falls - Kifi?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Idaho Falls (16 mi SE) (16 miles away), records 66 inches of snow in a normal year.
What is the rainiest month at Idaho Falls - Kifi?
May, with 1.93 in of precipitation in a normal year; the driest is July with 0.51 in.
What plant hardiness zone is Idaho Falls - Kifi in?
The USDA's 2023 map puts Idaho Falls - Kifi in zone 5b in ZIP code 83404, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −10°F (25 years, 1991-2020): zone 6a.
How late can frost come at Idaho Falls - Kifi?
In half of years the last 32°F night comes after May 9; in one year in ten it comes after June 2. Waiting until June 2 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Idaho climateThe statewide normals and every place in the state
- Idaho Falls, ID2 miles from this station, 44.2°F a year
- Rigby, ID12 miles from this station, 45.9°F a year
- Rexburg BYU Idaho, ID23 miles from this station, 44.8°F a year
- Rexburg, ID24 miles from this station, 44.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made