Annex Creek, Alaska climate: Climate normals at a NOAA weather station
Annex Creek's normal year runs from 20°F January nights to 59°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 4.1°C, January lows of −7°C, July highs of 15°C.
- NOAA stationAnnex Creek
- Station IDUSC00500363
- Location58.32°N 134.10°W
- Elevation92 ft (28 m)
On October 23, the normal high in Annex Creek is 43°F and the normal low 35°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Annex Creek.
- Jan 29° 20°
- Feb 32° 23°
- Mar 37° 27°
- Apr 46° 33°
- May 54° 39°
- Jun 59° 45°
- Jul 59° 46°
- Aug 59° 45°
- Sep 53° 43°
- Oct 45° 37°
- Nov 35° 28°
- Dec 29° 22°
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 Annex Creek each month?
July is the warmest month, with normal highs of 59°F; January the coldest, with normal lows of 20°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 29°F | 20°F | 24.2°F | – | <1 | 29 | 7 h |
| February | 32°F | 23°F | 27.6°F | – | <1 | 25 | 9 h 20 min |
| March | 37°F | 27°F | 31.8°F | – | <1 | 26 | 11 h 40 min |
| April | 46°F | 33°F | 39.5°F | – | <1 | 12 | 14 h 20 min |
| May | 54°F | 39°F | 46.8°F | – | <1 | 1 | 16 h 40 min |
| June | 59°F | 45°F | 52.0°F | – | <1 | <1 | 18 h 10 min |
| July | 59°F | 46°F | 52.6°F | – | <1 | <1 | 17 h 40 min |
| August | 59°F | 45°F | 52.0°F | – | <1 | <1 | 15 h 30 min |
| September | 53°F | 43°F | 48.1°F | – | <1 | <1 | 13 h |
| October | 45°F | 37°F | 40.9°F | – | <1 | 6 | 10 h 20 min |
| November | 35°F | 28°F | 31.4°F | – | <1 | 23 | 8 h |
| December | 29°F | 22°F | 25.6°F | – | <1 | 29 | 6 h 30 min |
| Year (annual) | 45°F | 34°F | 39.4°F | – | <1 | 149 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | −2°C | −7°C | −4.3°C |
| February | 0°C | −5°C | −2.4°C |
| March | 3°C | −3°C | −0.1°C |
| April | 8°C | 0°C | 4.2°C |
| May | 12°C | 4°C | 8.2°C |
| June | 15°C | 7°C | 11.1°C |
| July | 15°C | 8°C | 11.4°C |
| August | 15°C | 7°C | 11.1°C |
| September | 12°C | 6°C | 8.9°C |
| October | 7°C | 3°C | 4.9°C |
| November | 2°C | −2°C | −0.3°C |
| December | −1°C | −6°C | −3.6°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Juneau (17 miles away), gets 88 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00500363; 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 Annex Creek?
No month's normal high reaches 65°F in Annex Creek: the warmest is June at 59°F.
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 USC00500363.
When is the last frost at Annex Creek?
In Annex Creek, the last spring frost (32°F) comes after May 3 in half of years and after May 18 in one year in ten; the first autumn frost comes before October 14 in half of years and before October 1 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 31 year in 10 after May 18; 9 in 10 after April 18
- First autumn frost, half of years before
- October 141 year in 10 before October 1; 9 in 10 before October 29
NOAA puts the median frost-free season at 164 days, and the season without a hard freeze (28°F) at 200 days.
A hard freeze (28°F) comes after April 11 in half of springs and before October 31 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Annex Creek in zone 6a in ZIP code 99801, the nearest ZIP area.
Frost dates for every NOAA station in Alaska · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00500363; 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 at Annex Creek?
In a normal year in Annex Creek, a 90°F day is rare and 149 nights fall to 32°F or colder.
- 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
- 149a normal year
- Days that stay below freezing
- 65high of 32°F or less
The highest temperature in this station's record (since 1917) is 84°F, on June 15, 1936; the lowest is −18°F, on February 1, 1917.
The wettest calendar year on that record is 1939, with 149.47 in; the snowiest season is 1958–59, with 353.8 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00500363; records: ACIS (NOAA Regional Climate Centers), station USC00500363. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Annex Creek?
Over a year 57% of the sunlight that would reach the ground under clear skies gets through the clouds at Annex Creek, 2.4 kWh per square metre a day. May is the sunniest month (62%) and January the cloudiest (46%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 46% | 0.3 |
| February | 53% | 1.0 |
| March | 56% | 2.1 |
| April | 60% | 3.6 |
| May | 62% | 4.7 |
| June | 59% | 4.9 |
| July | 56% | 4.3 |
| August | 56% | 3.5 |
| September | 53% | 2.2 |
| October | 49% | 1.1 |
| November | 47% | 0.5 |
| December | 47% | 0.2 |
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 Annex Creek record?
A normal year at Annex Creek brings 9,334 heating degree days, 74% more than the median U.S. place (5,373), and 0 cooling degree days, 100% fewer than the median (908). Twelve months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 293 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,266 | 0 |
| February | 1,047 | 0 |
| March | 1,029 | 0 |
| April | 767 | 0 |
| May | 564 | 0 |
| June | 390 | 0 |
| July | 384 | 0 |
| August | 402 | 0 |
| September | 509 | 0 |
| October | 747 | 0 |
| November | 1,008 | 0 |
| December | 1,221 | 0 |
| Year (annual) | 9,334 | 0 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00500363. 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.
Have recent years at Annex Creek been warmer than normal?
2025 averaged 39.0°F, 0.4°F below the 1991-2020 normal of 39.4°F. 1 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal |
|---|---|---|
| 2021 | 38.1°F | −1.3°F |
| 2023 | 40.8°F | +1.4°F |
| 2024 | 38.9°F | −0.5°F |
| 2025 | 39.0°F | −0.4°F |
Over 62 complete years from 1917 to 2025, the station's annual mean temperature rose at a fitted 3.3°F per century (+0.18°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00500363; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Annex Creek's climate compare?
Annex Creek is warmer than 57 of the 85 places with their own NOAA record in Alaska. Across the 7,247 U.S. stations with normals, its annual mean of 39.4°F is warmer than 5%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Questions about Annex Creek's climate
What is the coldest month at Annex Creek?
January, with a normal high of 29°F and a normal low of 20°F. The warmest is July (59°F by day, 46°F at night).
Does it snow at Annex Creek?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Juneau (17 miles away), records 88 inches of snow in a normal year.
What plant hardiness zone is Annex Creek in?
The USDA's 2023 map puts Annex Creek in zone 6a in ZIP code 99801, the nearest ZIP area.
How late can frost come at Annex Creek?
In half of years the last 32°F night comes after May 3; in one year in ten it comes after May 18. Waiting until May 18 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Alaska climateThe statewide normals and every place in the state
- Juneau Downtown, AK11 miles from this station, 43.5°F a year
- Eaglecrest Base, AK16 miles from this station, 38.0°F a year
- Juneau, AK17 miles from this station, 42.1°F a year
- Snettisham Power Plant, AK18 miles from this station, 41.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made