Connell, Washington climate: Normal weather by month, frost dates and records
Connell's normal year runs from 27°F January nights to 90°F July afternoons, with 8.8 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.9°C, January lows of −3°C, July highs of 32°C, 224 mm of precipitation a year.
- NOAA stationConnell (1 mi W)
- Station IDUSC00451690
- Location46.66°N 118.88°W
- Elevation1,020 ft (311 m)
- From the center2 miles
- Population5,071
On October 23, the normal high in Connell is 59°F and the normal low 35°F, and the chance of measurable rain or snow is 22%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Connell.
- Jan 39° 27°
- Feb 46° 29°
- Mar 56° 32°
- Apr 65° 37°
- May 74° 44°
- Jun 80° 50°
- Jul 90° 55°
- Aug 88° 55°
- Sep 79° 47°
- Oct 64° 38°
- Nov 48° 31°
- Dec 39° 27°
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 Connell each month?
July is the warmest month, with normal highs of 90°F; January the coldest, with normal lows of 27°F. The most precipitation falls in December (1.27 in), the least in August (0.23 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 39°F | 27°F | 32.9°F | 1.17 | 11 | <1 | 23 | 9 h |
| February | 46°F | 29°F | 37.5°F | 0.80 | 9 | <1 | 18 | 10 h 20 min |
| March | 56°F | 32°F | 44.1°F | 0.84 | 7 | <1 | 16 | 11 h 50 min |
| April | 65°F | 37°F | 51.0°F | 0.74 | 7 | <1 | 7 | 13 h 30 min |
| May | 74°F | 44°F | 59.1°F | 0.83 | 6 | 1 | 2 | 15 h |
| June | 80°F | 50°F | 65.2°F | 0.58 | 5 | 4 | <1 | 15 h 50 min |
| July | 90°F | 55°F | 72.4°F | 0.29 | 3 | 15 | <1 | 15 h 30 min |
| August | 88°F | 55°F | 71.4°F | 0.23 | 2 | 13 | <1 | 14 h 20 min |
| September | 79°F | 47°F | 63.3°F | 0.30 | 3 | 2 | 1 | 12 h 40 min |
| October | 64°F | 38°F | 50.8°F | 0.77 | 6 | <1 | 9 | 11 h |
| November | 48°F | 31°F | 39.5°F | 1.01 | 11 | <1 | 16 | 9 h 30 min |
| December | 39°F | 27°F | 32.9°F | 1.27 | 10 | <1 | 24 | 8 h 40 min |
| Year (annual) | 64°F | 39°F | 51.7°F | 8.83 | 79 | 35 | 115 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 4°C | −3°C | 0.5°C | 30 mm |
| February | 8°C | −2°C | 3.1°C | 20 mm |
| March | 13°C | 0°C | 6.7°C | 21 mm |
| April | 18°C | 3°C | 10.6°C | 19 mm |
| May | 23°C | 7°C | 15.1°C | 21 mm |
| June | 27°C | 10°C | 18.4°C | 15 mm |
| July | 32°C | 13°C | 22.4°C | 7 mm |
| August | 31°C | 13°C | 21.9°C | 6 mm |
| September | 26°C | 8°C | 17.4°C | 8 mm |
| October | 18°C | 3°C | 10.4°C | 20 mm |
| November | 9°C | 0°C | 4.2°C | 26 mm |
| December | 4°C | −3°C | 0.5°C | 32 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Hatton (12 miles away), gets 14 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00451690; 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 Connell?
Normal highs sit between 65°F and 85°F in May, June and September. Of those, September has the fewest days with rain (3).
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 USC00451690.
When is the last frost in Connell?
In Connell, the last spring frost (32°F) comes after April 30 in half of years and after May 15 in one year in ten; the first autumn frost comes before October 12 in half of years and before September 29 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 301 year in 10 after May 15; 9 in 10 after April 12
- First autumn frost, half of years before
- October 121 year in 10 before September 29; 9 in 10 before October 26
NOAA puts the median frost-free season at 165 days, and the season without a hard freeze (28°F) at 197 days.
A hard freeze (28°F) comes after April 10 in half of springs and before October 24 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Connell in zone 7a in ZIP code 99326, the nearest ZIP area.
Frost dates for every NOAA station in Washington · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00451690; 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 Connell?
In a normal year in Connell, 35 days a year reach 90°F (3 of them 100°F or more), 115 nights fall to 32°F or colder and 79 days bring measurable precipitation.
- Days at 90°F or more
- 35a normal year
- Days at 100°F or more
- 3a normal year
- Nights at 32°F or colder
- 115a normal year
- Days that stay below freezing
- 20high of 32°F or less
- Days with 0.01 inch of precipitation
- 79a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00451690.
How sunny is Connell?
Over a year 81% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Connell, 4.2 kWh per square metre a day. July is the sunniest month (94%) and December the cloudiest (55%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 56% | 1.2 |
| February | 69% | 2.3 |
| March | 72% | 3.6 |
| April | 79% | 5.4 |
| May | 81% | 6.5 |
| June | 85% | 7.2 |
| July | 94% | 7.7 |
| August | 92% | 6.4 |
| September | 87% | 4.7 |
| October | 79% | 3.0 |
| November | 65% | 1.6 |
| December | 55% | 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 much heating and cooling does Connell need?
A normal year in Connell brings 5,450 heating degree days, 1% more than the median U.S. place (5,373), and 610 cooling degree days, 33% 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 2,714 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 995 | 0 |
| February | 770 | 0 |
| March | 648 | 0 |
| April | 421 | 1 |
| May | 210 | 26 |
| June | 69 | 75 |
| July | 9 | 238 |
| August | 16 | 216 |
| September | 106 | 54 |
| October | 443 | 1 |
| November | 766 | 0 |
| December | 997 | 0 |
| Year (annual) | 5,450 | 610 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00451690. 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 Connell's climate compare?
Connell is warmer than 75 of the other 95 places with their own NOAA record in Washington, and wetter than 12. Across the 7,247 U.S. stations with normals, its annual mean of 51.7°F is warmer than 48%.
In the Köppen classification computed from these normals, Connell 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.
Which places near Connell 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.
- Othello, WA9,001 people · 17 mi NW
- Mesa, WA388 people · 8 mi SW
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 Connell's climate
What is the coldest month in Connell?
January, with a normal high of 39°F and a normal low of 27°F. The warmest is July (90°F by day, 55°F at night).
Does it snow in Connell?
Yes. NOAA publishes no 1991-2020 snowfall normal for Connell's NOAA station; the nearest record that keeps one, Hatton (12 miles away), records 14 inches of snow in a normal year.
What is the rainiest month in Connell?
December, with 1.27 in of precipitation in a normal year; the driest is August with 0.23 in.
What plant hardiness zone is Connell in?
The USDA's 2023 map puts Connell in zone 7a in ZIP code 99326, the nearest ZIP area.
How late can frost come in Connell?
In half of years the last 32°F night comes after April 30; in one year in ten it comes after May 15. Waiting until May 15 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Washington climateThe statewide normals and every place in the state
- Hatton, WA12 miles from this station, 51.8°F a year
- Sagemoor, WA21 miles from this station, 52.0°F a year
- Eltopia (8 mi WSW), WA22 miles from this station, 51.9°F a year
- Lind, WA28 miles from this station, 50.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made