Sugar City, Idaho climate: Normal weather by month, frost dates and records
Sugar City's normal year runs from 9°F January nights to 83°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 5.9°C, January lows of −13°C, July highs of 28°C.
- NOAA stationSugar City
- Station IDUSC00108818
- Location43.89°N 111.74°W
- Elevation4,925 ft (1,501 m)
- Population2,395
On October 23, the normal high in Sugar City is 55°F and the normal low 27°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Sugar City.
- Jan 29° 9°
- Feb 34° 12°
- Mar 46° 23°
- Apr 57° 30°
- May 67° 37°
- Jun 75° 43°
- Jul 83° 48°
- Aug 84° 46°
- Sep 74° 38°
- Oct 59° 29°
- Nov 43° 21°
- Dec 30° 11°
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 Sugar City each month?
July is the warmest month, with normal highs of 83°F; January the coldest, with normal lows of 9°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 29°F | 9°F | 19.1°F | – | <1 | 31 | 9 h 10 min |
| February | 34°F | 12°F | 23.0°F | – | <1 | 26 | 10 h 30 min |
| March | 46°F | 23°F | 34.4°F | – | <1 | 26 | 11 h 50 min |
| April | 57°F | 30°F | 43.4°F | – | <1 | 19 | 13 h 20 min |
| May | 67°F | 37°F | 51.9°F | – | <1 | 8 | 14 h 40 min |
| June | 75°F | 43°F | 58.9°F | – | <1 | 1 | 15 h 30 min |
| July | 83°F | 48°F | 65.1°F | – | 3 | <1 | 15 h 10 min |
| August | 84°F | 46°F | 64.7°F | – | 4 | <1 | 14 h |
| September | 74°F | 38°F | 55.7°F | – | <1 | 6 | 12 h 40 min |
| October | 59°F | 29°F | 44.1°F | – | <1 | 20 | 11 h 10 min |
| November | 43°F | 21°F | 31.9°F | – | <1 | 27 | 9 h 40 min |
| December | 30°F | 11°F | 20.5°F | – | <1 | 30 | 9 h |
| Year (annual) | 57°F | 29°F | 42.7°F | – | 8 | 193 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | −2°C | −13°C | −7.2°C |
| February | 1°C | −11°C | −5.0°C |
| March | 8°C | −5°C | 1.3°C |
| April | 14°C | −1°C | 6.3°C |
| May | 19°C | 3°C | 11.1°C |
| June | 24°C | 6°C | 14.9°C |
| July | 28°C | 9°C | 18.4°C |
| August | 29°C | 8°C | 18.2°C |
| September | 23°C | 3°C | 13.2°C |
| October | 15°C | −1°C | 6.7°C |
| November | 6°C | −6°C | −0.1°C |
| December | −1°C | −12°C | −6.4°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Ashton (19 miles away), gets 70 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00108818; 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 Sugar City?
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 USC00108818.
When is the last frost in Sugar City?
In Sugar City, the last spring frost (32°F) comes after May 29 in half of years and after June 18 in one year in ten; the first autumn frost comes before September 13 in half of years and before August 30 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 291 year in 10 after June 18; 9 in 10 after May 12
- First autumn frost, half of years before
- September 131 year in 10 before August 30; 9 in 10 before October 1
NOAA puts the median frost-free season at 106 days, and the season without a hard freeze (28°F) at 138 days.
A hard freeze (28°F) comes after May 9 in half of springs and before September 25 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Sugar City in zone 5a in ZIP code 83448, the nearest ZIP area.
Frost dates for every NOAA station in Idaho · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00108818; 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 Sugar City?
In a normal year in Sugar City, 8 days a year reach 90°F and 193 nights fall to 32°F or colder.
- Days at 90°F or more
- 8a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 193a normal year
- Days that stay below freezing
- 57high of 32°F or less
The highest temperature in this station's record (since 1907) is 104°F, on July 12, 1919; the lowest is −42°F, on January 30, 2023.
The wettest calendar year on that record is 2023, with 18.50 in; the snowiest season is 1948–49, with 92.6 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00108818; records: ACIS (NOAA Regional Climate Centers), station USC00108818. Records use complete months only; a month missing more than three days is left out.
How sunny is Sugar City?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Sugar City, 4.4 kWh per square metre a day. July is the sunniest month (89%) and December the cloudiest (58%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 64% | 1.8 |
| February | 66% | 2.7 |
| March | 69% | 4.0 |
| April | 70% | 5.2 |
| May | 74% | 6.3 |
| June | 82% | 7.3 |
| July | 89% | 7.6 |
| August | 87% | 6.5 |
| September | 83% | 5.0 |
| October | 74% | 3.2 |
| November | 66% | 1.9 |
| December | 58% | 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 much heating and cooling does Sugar City need?
A normal year in Sugar City brings 8,210 heating degree days, 53% more than the median U.S. place (5,373), and 118 cooling degree days, 87% 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 1,550 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,424 | 0 |
| February | 1,175 | 0 |
| March | 949 | 0 |
| April | 648 | 0 |
| May | 407 | 1 |
| June | 193 | 10 |
| July | 52 | 54 |
| August | 61 | 50 |
| September | 283 | 4 |
| October | 646 | 0 |
| November | 995 | 0 |
| December | 1,378 | 0 |
| Year (annual) | 8,210 | 118 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00108818. 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 Sugar City been warmer than normal lately?
2025 averaged 45.9°F, 3.2°F above the 1991-2020 normal of 42.7°F. 3 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal |
|---|---|---|
| 2021 | 44.4°F | +1.7°F |
| 2022 | 41.8°F | −0.9°F |
| 2023 | 42.4°F | −0.3°F |
| 2024 | 45.5°F | +2.8°F |
| 2025 | 45.9°F | +3.2°F |
Source: observed years: ACIS, station USC00108818. A year counts only with all twelve months complete.
How does Sugar City's climate compare?
Sugar City is warmer than 14 of the other 84 places with their own NOAA record in Idaho. Across the 7,247 U.S. stations with normals, its annual mean of 42.7°F is warmer than 11%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Sugar City share this climate record?
Teton 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.
- Teton, ID850 people · 3 mi E
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 Sugar City's climate
What is the coldest month in Sugar City?
January, with a normal high of 29°F and a normal low of 9°F. The warmest is July (83°F by day, 48°F at night).
Does it snow in Sugar City?
Yes. NOAA publishes no 1991-2020 snowfall normal for Sugar City's NOAA station; the nearest record that keeps one, Ashton (19 miles away), records 70 inches of snow in a normal year.
What plant hardiness zone is Sugar City in?
The USDA's 2023 map puts Sugar City in zone 5a in ZIP code 83448, the nearest ZIP area.
How late can frost come in Sugar City?
In half of years the last 32°F night comes after May 29; in one year in ten it comes after June 18. Waiting until June 18 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Idaho climateThe statewide normals and every place in the state
- Rexburg, ID5 miles from this station, 44.0°F a year
- St. Anthony, ID6 miles from this station, 43.1°F a year
- Rexburg BYU Idaho, ID6 miles from this station, 44.8°F a year
- Rigby, ID17 miles from this station, 45.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made