Oakley, Idaho climate: Normal weather by month, frost dates and records
Oakley's normal year runs from 21°F December nights to 86°F July afternoons, with 12.3 inches of precipitation and 25 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.8°C, December lows of −6°C, July highs of 30°C, 313 mm of precipitation a year.
- NOAA stationOakley
- Station IDUSC00106542
- Location42.23°N 113.90°W
- Elevation4,559 ft (1,390 m)
- Population831
On October 22, the normal high in Oakley is 61°F and the normal low 35°F, and the chance of measurable rain or snow is 16%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Oakley.
- Jan 40° 21°
- Feb 45° 24°
- Mar 54° 30°
- Apr 60° 34°
- May 69° 42°
- Jun 78° 48°
- Jul 86° 57°
- Aug 86° 56°
- Sep 77° 47°
- Oct 64° 37°
- Nov 50° 28°
- Dec 39° 21°
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 Oakley each month?
July is the warmest month, with normal highs of 86°F; December the coldest, with normal lows of 21°F. The most precipitation falls in May (2.05 in), the least in February (0.69 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 40°F | 21°F | 30.6°F | 0.82 | 5.7 | 7 | <1 | 28 | 9 h 20 min |
| February | 45°F | 24°F | 34.3°F | 0.69 | 5.0 | 6 | <1 | 23 | 10 h 30 min |
| March | 54°F | 30°F | 41.8°F | 1.14 | 4.2 | 7 | <1 | 20 | 11 h 50 min |
| April | 60°F | 34°F | 47.2°F | 1.55 | 2.0 | 8 | <1 | 13 | 13 h 20 min |
| May | 69°F | 42°F | 55.1°F | 2.05 | 0.2 | 10 | <1 | 3 | 14 h 30 min |
| June | 78°F | 48°F | 63.0°F | 1.12 | 0.0 | 6 | 2 | <1 | 15 h 10 min |
| July | 86°F | 57°F | 71.5°F | 0.69 | 0.0 | 4 | 9 | <1 | 15 h |
| August | 86°F | 56°F | 70.5°F | 0.72 | 0.0 | 4 | 8 | <1 | 14 h |
| September | 77°F | 47°F | 61.9°F | 1.08 | 0.0 | 4 | 1 | 1 | 12 h 30 min |
| October | 64°F | 37°F | 50.5°F | 0.88 | 0.6 | 5 | <1 | 8 | 11 h 10 min |
| November | 50°F | 28°F | 38.6°F | 0.78 | 2.2 | 6 | <1 | 20 | 9 h 50 min |
| December | 39°F | 21°F | 30.1°F | 0.79 | 5.2 | 6 | <1 | 27 | 9 h 10 min |
| Year (annual) | 62°F | 37°F | 49.6°F | 12.31 | 25.1 | 72 | 20 | 143 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 4°C | −6°C | −0.8°C | 21 mm | 14 cm |
| February | 7°C | −4°C | 1.3°C | 18 mm | 13 cm |
| March | 12°C | −1°C | 5.4°C | 29 mm | 11 cm |
| April | 16°C | 1°C | 8.4°C | 39 mm | 5 cm |
| May | 20°C | 5°C | 12.8°C | 52 mm | 1 cm |
| June | 25°C | 9°C | 17.2°C | 28 mm | 0 cm |
| July | 30°C | 14°C | 21.9°C | 18 mm | 0 cm |
| August | 30°C | 13°C | 21.4°C | 18 mm | 0 cm |
| September | 25°C | 8°C | 16.6°C | 27 mm | 0 cm |
| October | 18°C | 3°C | 10.3°C | 22 mm | 2 cm |
| November | 10°C | −2°C | 3.7°C | 20 mm | 6 cm |
| December | 4°C | −6°C | −1.1°C | 20 mm | 13 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00106542; 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 Oakley?
Normal highs sit between 65°F and 85°F in May, June and September. Of those, September 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 USC00106542.
When is the last frost in Oakley?
In Oakley, the last spring frost (32°F) comes after May 15 in half of years and after June 6 in one year in ten; the first autumn frost comes before October 2 in half of years and before September 16 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 151 year in 10 after June 6; 9 in 10 after April 30
- First autumn frost, half of years before
- October 21 year in 10 before September 16; 9 in 10 before October 17
NOAA puts the median frost-free season at 137 days, and the season without a hard freeze (28°F) at 170 days.
A hard freeze (28°F) comes after April 30 in half of springs and before October 16 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Oakley in zone 6b in ZIP code 83346, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Oakley's NOAA station is in zone 6b: the coldest night of a typical year reaches −4°F (29 complete years).
Frost dates for every NOAA station in Idaho · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00106542; 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 Oakley?
In a normal year in Oakley, 20 days a year reach 90°F, 143 nights fall to 32°F or colder and 72 days bring measurable precipitation.
- Days at 90°F or more
- 20a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 143a normal year
- Days that stay below freezing
- 19high of 32°F or less
- Days with 0.01 inch of precipitation
- 72a normal year
- Days with 1 inch of snow or more
- 12a normal year
The highest temperature in this station's record (since 1893) is 107°F, on August 22, 1913; the lowest is −27°F, on February 9, 1933.
The wettest calendar year on that record is 2005, with 18.35 in; the snowiest season is 1948–49, with 80.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00106542; records: ACIS (NOAA Regional Climate Centers), station USC00106542. Records use complete months only; a month missing more than three days is left out.
How sunny is Oakley?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Oakley, 4.6 kWh per square metre a day. July is the sunniest month (89%) and December the cloudiest (61%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 68% | 1.9 |
| February | 69% | 2.8 |
| March | 71% | 4.0 |
| April | 75% | 5.4 |
| May | 78% | 6.6 |
| June | 85% | 7.6 |
| July | 89% | 7.5 |
| August | 89% | 6.6 |
| September | 86% | 5.2 |
| October | 81% | 3.6 |
| November | 72% | 2.2 |
| December | 61% | 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 Oakley need?
A normal year in Oakley brings 6,115 heating degree days, 14% more than the median U.S. place (5,373), and 529 cooling degree days, 42% 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 2,445 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,065 | 0 |
| February | 858 | 0 |
| March | 719 | 0 |
| April | 536 | 0 |
| May | 313 | 8 |
| June | 120 | 60 |
| July | 16 | 217 |
| August | 21 | 193 |
| September | 141 | 49 |
| October | 451 | 2 |
| November | 792 | 0 |
| December | 1,083 | 0 |
| Year (annual) | 6,115 | 529 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00106542. 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 Oakley been warmer than normal lately?
2025 averaged 52.0°F, 2.4°F above the 1991-2020 normal of 49.6°F. 3 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 51.5°F | +1.9°F | 11.64 | – |
| 2023 | 49.0°F | −0.6°F | 16.30 | 35.5 |
| 2024 | 51.3°F | +1.7°F | 11.81 | 32.0 |
| 2025 | 52.0°F | +2.4°F | 9.12 | 8.0 |
Over 109 complete years from 1894 to 2025, the station's annual mean temperature rose at a fitted 2.1°F per century (+0.11°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00106542; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Oakley's climate compare?
Oakley is warmer than 66 of the other 84 places with their own NOAA record in Idaho, and wetter than 33. Across the 7,247 U.S. stations with normals, its annual mean of 49.6°F is warmer than 38%.
In the Köppen classification computed from these normals, Oakley is BSk: cold semi-arid steppe. 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 Oakley's climate
What is the coldest month in Oakley?
December, with a normal high of 39°F and a normal low of 21°F. The warmest is July (86°F by day, 57°F at night).
Does it snow in Oakley?
Yes: 25 inches in a normal year, falling on 13 days with 0.1 inch or more, the most in January (5.7 inches).
What is the rainiest month in Oakley?
May, with 2.05 in of precipitation in a normal year; the driest is February with 0.69 in.
What plant hardiness zone is Oakley in?
The USDA's 2023 map puts Oakley in zone 6b in ZIP code 83346, the nearest ZIP area. By the same method at Oakley's NOAA station, the coldest night of a typical year reaches −4°F (29 years, 1991-2020): zone 6b.
How late can frost come in Oakley?
In half of years the last 32°F night comes after May 15; in one year in ten it comes after June 6. Waiting until June 6 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Idaho climateThe statewide normals and every place in the state
- Burley, ID22 miles from this station, 49.0°F a year
- Paul, ID27 miles from this station, 47.0°F a year
- Malta, ID27 miles from this station, 46.2°F a year
- Hazelton, ID28 miles from this station, 48.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made