Delta (5 mi NE), Alaska climate: Climate normals at a NOAA weather station
Delta (5 mi NE)'s normal year runs from −13°F January nights to 72°F July afternoons, with 13.4 inches of precipitation and 45 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of −2.6°C, January lows of −25°C, July highs of 22°C, 340 mm of precipitation a year.
- NOAA stationDelta (5 mi NE)
- Station IDUSC00502350
- Location64.08°N 145.61°W
- Elevation1,060 ft (323 m)
On October 23, the normal high in Delta (5 mi NE) is 27°F and the normal low 10°F, and the chance of measurable rain or snow is 29%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Delta (5 mi NE).
- Jan 3° -13°
- Feb 14° -7°
- Mar 27° -1°
- Apr 47° 19°
- May 62° 32°
- Jun 71° 44°
- Jul 72° 47°
- Aug 66° 42°
- Sep 54° 31°
- Oct 33° 15°
- Nov 12° -4°
- Dec 6° -10°
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 Delta (5 mi NE) each month?
July is the warmest month, with normal highs of 72°F; January the coldest, with normal lows of −13°F. The most precipitation falls in July (3.03 in), the least in April (0.24 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 3°F | −13°F | -5.2°F | 0.50 | 6.1 | 7 | <1 | 31 | 5 h 20 min |
| February | 14°F | −7°F | 3.4°F | 0.35 | 4.6 | 5 | <1 | 28 | 8 h 30 min |
| March | 27°F | −1°F | 12.7°F | 0.25 | 4.0 | 5 | <1 | 31 | 11 h 40 min |
| April | 47°F | 19°F | 32.6°F | 0.24 | 3.1 | 4 | <1 | 29 | 15 h |
| May | 62°F | 32°F | 47.1°F | 0.94 | 1.7 | 8 | <1 | 17 | 18 h 20 min |
| June | 71°F | 44°F | 57.3°F | 2.97 | 0.1 | 12 | <1 | 2 | 21 h |
| July | 72°F | 47°F | 59.6°F | 3.03 | 0.0 | 15 | <1 | <1 | 19 h 50 min |
| August | 66°F | 42°F | 54.0°F | 2.06 | 0.0 | 15 | <1 | 4 | 16 h 30 min |
| September | 54°F | 31°F | 42.4°F | 1.14 | 2.3 | 10 | <1 | 19 | 13 h 10 min |
| October | 33°F | 15°F | 24.0°F | 0.69 | 7.3 | 8 | <1 | 29 | 10 h |
| November | 12°F | −4°F | 3.6°F | 0.64 | 7.8 | 9 | <1 | 30 | 6 h 40 min |
| December | 6°F | −10°F | -2.1°F | 0.57 | 8.0 | 8 | <1 | 31 | 4 h 20 min |
| Year (annual) | 39°F | 16°F | 27.4°F | 13.38 | 45.0 | 106 | <1 | 250 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −16°C | −25°C | −20.7°C | 13 mm | 15 cm |
| February | −10°C | −22°C | −15.9°C | 9 mm | 12 cm |
| March | −3°C | −19°C | −10.7°C | 6 mm | 10 cm |
| April | 8°C | −7°C | 0.3°C | 6 mm | 8 cm |
| May | 17°C | 0°C | 8.4°C | 24 mm | 4 cm |
| June | 22°C | 6°C | 14.1°C | 75 mm | 0 cm |
| July | 22°C | 8°C | 15.3°C | 77 mm | 0 cm |
| August | 19°C | 6°C | 12.2°C | 52 mm | 0 cm |
| September | 12°C | −1°C | 5.8°C | 29 mm | 6 cm |
| October | 0°C | −9°C | −4.4°C | 18 mm | 19 cm |
| November | −11°C | −20°C | −15.8°C | 16 mm | 20 cm |
| December | −14°C | −24°C | −18.9°C | 14 mm | 20 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00502350; 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 Delta (5 mi NE)?
Normal highs sit between 65°F and 85°F in June, July and August. Of those, June has the fewest days with rain (12).
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 USC00502350.
When is the last frost at Delta (5 mi NE)?
In Delta (5 mi NE), the last spring frost (32°F) comes after June 4 in half of years and after July 17 in one year in ten; the first autumn frost comes before August 22 in half of years and before August 7 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
- June 41 year in 10 after July 17; 9 in 10 after May 25
- First autumn frost, half of years before
- August 221 year in 10 before August 7; 9 in 10 before September 4
NOAA puts the median frost-free season at 75 days, and the season without a hard freeze (28°F) at 99 days.
A hard freeze (28°F) comes after May 24 in half of springs and before September 1 in half of autumns.
Frost dates for every NOAA station in Alaska · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00502350. 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 Delta (5 mi NE)?
In a normal year in Delta (5 mi NE), a 90°F day is rare, 250 nights fall to 32°F or colder and 106 days bring measurable precipitation.
- Days at 90°F or more
- fewer than 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 250a normal year
- Days that stay below freezing
- 153high of 32°F or less
- Days with 0.01 inch of precipitation
- 106a normal year
- Days with 1 inch of snow or more
- 17a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00502350.
How sunny is it at Delta (5 mi NE)?
Over a year 70% of the sunlight that would reach the ground under clear skies gets through the clouds at Delta (5 mi NE), 2.5 kWh per square metre a day. March is the sunniest month (85%) and October the cloudiest (62%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 76% | 0.2 |
| February | 77% | 0.9 |
| March | 85% | 2.6 |
| April | 83% | 4.5 |
| May | 70% | 5.0 |
| June | 65% | 5.2 |
| July | 63% | 4.6 |
| August | 65% | 3.6 |
| September | 66% | 2.3 |
| October | 62% | 1.0 |
| November | 65% | 0.3 |
| December | 81% | 0.1 |
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 Delta (5 mi NE) record?
A normal year at Delta (5 mi NE) brings 13,685 heating degree days, 2.5 times the median U.S. place (5,373), and 20 cooling degree days, 98% fewer than the median (908). Ten months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 744 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 2,176 | 0 |
| February | 1,725 | 0 |
| March | 1,621 | 0 |
| April | 972 | 0 |
| May | 555 | 0 |
| June | 241 | 8 |
| July | 176 | 8 |
| August | 345 | 4 |
| September | 680 | 0 |
| October | 1,271 | 0 |
| November | 1,842 | 0 |
| December | 2,082 | 0 |
| Year (annual) | 13,685 | 20 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00502350. 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 Delta (5 mi NE)'s climate compare?
Delta (5 mi NE) is warmer than 22 of the 85 places with their own NOAA record in Alaska, and wetter than 18. Across the 7,247 U.S. stations with normals, its annual mean of 27.4°F is warmer than 1%.
In the Köppen classification computed from these normals, Delta (5 mi NE) is Dwc: continental, dry-winter, cool 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 Delta (5 mi NE)'s climate
What is the coldest month at Delta (5 mi NE)?
January, with a normal high of 3°F and a normal low of −13°F. The warmest is July (72°F by day, 47°F at night).
Does it snow at Delta (5 mi NE)?
Yes: 45 inches in a normal year, falling on 51 days with 0.1 inch or more, the most in December (8.0 inches).
What is the rainiest month at Delta (5 mi NE)?
July, with 3.03 in of precipitation in a normal year; the driest is April with 0.24 in.
How late can frost come at Delta (5 mi NE)?
In half of years the last 32°F night comes after June 4; in one year in ten it comes after July 17. Waiting until July 17 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Alaska climateThe statewide normals and every place in the state
- Delta (6 mi N), AK5 miles from this station, 25.9°F a year
- Delta Junction, AK7 miles from this station, 30.0°F a year
- Whitestone, AK9 miles from this station, 29.6°F a year
- Dry Creek, AK42 miles from this station, 27.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made