Lowell Three Rivers, Idaho climate: Climate normals at a NOAA weather station
Lowell Three Rivers's normal year runs from 29°F December nights to 92°F July afternoons, with 39.7 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.0°C, December lows of −2°C, July highs of 33°C, 1,008 mm of precipitation a year.
- NOAA stationLowell Three Rivers
- Station IDUSW00004109
- Location46.14°N 115.60°W
- Elevation1,480 ft (451 m)
On October 23, the normal high in Lowell Three Rivers is 57°F and the normal low 38°F, and the chance of measurable rain or snow is 48%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Lowell Three Rivers.
- Jan 40° 29°
- Feb 44° 30°
- Mar 54° 34°
- Apr 63° 38°
- May 72° 44°
- Jun 79° 50°
- Jul 92° 55°
- Aug 92° 54°
- Sep 79° 48°
- Oct 61° 40°
- Nov 46° 33°
- Dec 38° 29°
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 Lowell Three Rivers each month?
July is the warmest month, with normal highs of 92°F; December the coldest, with normal lows of 29°F. The most precipitation falls in November (5.03 in), the least in July (0.63 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 40°F | 29°F | 34.4°F | 4.89 | 18 | <1 | 21 | 9 h |
| February | 44°F | 30°F | 37.3°F | 3.86 | 16 | <1 | 19 | 10 h 20 min |
| March | 54°F | 34°F | 44.0°F | 4.63 | 17 | <1 | 13 | 11 h 50 min |
| April | 63°F | 38°F | 50.4°F | 4.23 | 15 | <1 | 3 | 13 h 30 min |
| May | 72°F | 44°F | 58.2°F | 3.31 | 15 | 1 | 1 | 15 h |
| June | 79°F | 50°F | 64.5°F | 2.84 | 12 | 5 | <1 | 15 h 40 min |
| July | 92°F | 55°F | 73.6°F | 0.63 | 4 | 21 | <1 | 15 h 30 min |
| August | 92°F | 54°F | 72.7°F | 0.88 | 5 | 21 | <1 | 14 h 10 min |
| September | 79°F | 48°F | 63.1°F | 1.51 | 8 | 3 | <1 | 12 h 40 min |
| October | 61°F | 40°F | 50.7°F | 3.58 | 14 | <1 | 3 | 11 h |
| November | 46°F | 33°F | 39.6°F | 5.03 | 16 | <1 | 11 | 9 h 30 min |
| December | 38°F | 29°F | 33.4°F | 4.30 | 17 | <1 | 23 | 8 h 40 min |
| Year (annual) | 63°F | 40°F | 51.8°F | 39.69 | 156 | 51 | 95 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 4°C | −1°C | 1.3°C | 124 mm |
| February | 7°C | −1°C | 2.9°C | 98 mm |
| March | 12°C | 1°C | 6.7°C | 118 mm |
| April | 17°C | 3°C | 10.2°C | 107 mm |
| May | 22°C | 7°C | 14.6°C | 84 mm |
| June | 26°C | 10°C | 18.1°C | 72 mm |
| July | 33°C | 13°C | 23.1°C | 16 mm |
| August | 33°C | 12°C | 22.6°C | 22 mm |
| September | 26°C | 9°C | 17.3°C | 38 mm |
| October | 16°C | 5°C | 10.4°C | 91 mm |
| November | 8°C | 1°C | 4.2°C | 128 mm |
| December | 3°C | −2°C | 0.8°C | 109 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Fenn Ranger Station (5 miles away), gets 43 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00004109; 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 Lowell Three Rivers?
Normal highs sit between 65°F and 85°F in May, June and September. Of those, September has the fewest days with rain (8).
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 USW00004109.
When is the last frost at Lowell Three Rivers?
In Lowell Three Rivers, the last spring frost (32°F) comes after April 16 in half of years and after May 4 in one year in ten; the first autumn frost comes before October 25 in half of years and before October 5 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
- April 161 year in 10 after May 4; 9 in 10 after March 26
- First autumn frost, half of years before
- October 251 year in 10 before October 5; 9 in 10 before November 13
NOAA puts the median frost-free season at 191 days, and the season without a hard freeze (28°F) at 236 days.
A hard freeze (28°F) comes after March 17 in half of springs and before November 10 in half of autumns.
By the USDA's method, the average of each year's coldest night over 1991-2020, the station is in plant hardiness zone 8a: the coldest night of a typical year reaches 12°F (18 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 USW00004109; 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 Lowell Three Rivers?
In a normal year in Lowell Three Rivers, 51 days a year reach 90°F (10 of them 100°F or more), 95 nights fall to 32°F or colder and 156 days bring measurable precipitation.
- Days at 90°F or more
- 51a normal year
- Days at 100°F or more
- 10a normal year
- Nights at 32°F or colder
- 95a normal year
- Days that stay below freezing
- 9high of 32°F or less
- Days with 0.01 inch of precipitation
- 156a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USW00004109.
How sunny is it at Lowell Three Rivers?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds at Lowell Three Rivers, 3.8 kWh per square metre a day. July is the sunniest month (89%) and December the cloudiest (52%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 56% | 1.3 |
| February | 58% | 2.0 |
| March | 59% | 3.1 |
| April | 64% | 4.4 |
| May | 68% | 5.6 |
| June | 73% | 6.4 |
| July | 89% | 7.4 |
| August | 86% | 6.2 |
| September | 79% | 4.4 |
| October | 67% | 2.6 |
| November | 56% | 1.4 |
| December | 52% | 1.0 |
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 Lowell Three Rivers record?
A normal year at Lowell Three Rivers brings 5,429 heating degree days, 1% more than the median U.S. place (5,373), and 652 cooling degree days, 28% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,712 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 949 | 0 |
| February | 776 | 0 |
| March | 653 | 0 |
| April | 437 | 0 |
| May | 225 | 16 |
| June | 84 | 69 |
| July | 7 | 272 |
| August | 8 | 245 |
| September | 106 | 50 |
| October | 444 | 1 |
| November | 762 | 0 |
| December | 981 | 0 |
| Year (annual) | 5,429 | 652 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00004109. 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.
How does Lowell Three Rivers's climate compare?
Lowell Three Rivers is warmer than 74 of the 85 places with their own NOAA record in Idaho, and wetter than 78. Across the 7,247 U.S. stations with normals, its annual mean of 51.8°F is warmer than 49%.
In the Köppen classification computed from these normals, Lowell Three Rivers is Csa: temperate, dry-summer, hot 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 Lowell Three Rivers's climate
What is the coldest month at Lowell Three Rivers?
December, with a normal high of 38°F and a normal low of 29°F. The warmest is July (92°F by day, 55°F at night).
Does it snow at Lowell Three Rivers?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Fenn Ranger Station (5 miles away), records 43 inches of snow in a normal year.
What is the rainiest month at Lowell Three Rivers?
November, with 5.03 in of precipitation in a normal year; the driest is July with 0.63 in.
What plant hardiness zone is Lowell Three Rivers in?
By the same method at the station, the coldest night of a typical year reaches 12°F (18 years, 1991-2020): zone 8a.
How late can frost come at Lowell Three Rivers?
In half of years the last 32°F night comes after April 16; in one year in ten it comes after May 4. Waiting until May 4 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Idaho climateThe statewide normals and every place in the state
- Fenn Ranger Station, ID4 miles from this station, 49.9°F a year
- Kooskia, ID17 miles from this station, 49.2°F a year
- Kamiah, ID22 miles from this station, 50.9°F a year
- Elk City, ID22 miles from this station, 42.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made