Hyder, Alaska climate: Normal weather by month, frost dates and records
Hyder's normal year runs from 22°F January nights to 68°F July afternoons, with 92.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.1°C, January lows of −5°C, July highs of 20°C, 2,350 mm of precipitation a year.
- NOAA stationHyder
- Station IDUSC00503821
- Location55.92°N 130.03°W
- Elevation80 ft (24 m)
- From the center5 miles
- Population (census place)16
On October 23, the normal high in Hyder is 45°F and the normal low 35°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Hyder.
- Jan 31° 22°
- Feb 35° 24°
- Mar 42° 28°
- Apr 51° 33°
- May 62° 40°
- Jun 67° 47°
- Jul 68° 51°
- Aug 67° 50°
- Sep 59° 45°
- Oct 48° 37°
- Nov 38° 30°
- Dec 32° 24°
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 Hyder each month?
July is the warmest month, with normal highs of 68°F; January the coldest, with normal lows of 22°F. The most precipitation falls in October (12.06 in), the least in June (3.48 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 31°F | 22°F | 26.8°F | 11.03 | – | <1 | 28 | 7 h 30 min |
| February | 35°F | 24°F | 29.7°F | 5.76 | – | <1 | 26 | 9 h 30 min |
| March | 42°F | 28°F | 34.9°F | 5.95 | – | <1 | 25 | 11 h 40 min |
| April | 51°F | 33°F | 42.0°F | 4.11 | – | <1 | 14 | 14 h 10 min |
| May | 62°F | 40°F | 50.8°F | 4.80 | – | <1 | 2 | 16 h 20 min |
| June | 67°F | 47°F | 57.1°F | 3.48 | – | <1 | <1 | 17 h 30 min |
| July | 68°F | 51°F | 59.7°F | 4.74 | – | <1 | <1 | 17 h |
| August | 67°F | 50°F | 58.2°F | 8.77 | – | <1 | <1 | 15 h 10 min |
| September | 59°F | 45°F | 52.1°F | 11.19 | – | <1 | <1 | 12 h 50 min |
| October | 48°F | 37°F | 42.3°F | 12.06 | – | <1 | 7 | 10 h 30 min |
| November | 38°F | 30°F | 33.7°F | 12.00 | – | <1 | 22 | 8 h 20 min |
| December | 32°F | 24°F | 28.1°F | 8.64 | – | <1 | 27 | 7 h |
| Year (annual) | 50°F | 36°F | 42.9°F | 92.53 | – | 1 | 152 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 0°C | −5°C | −2.9°C | 280 mm |
| February | 2°C | −4°C | −1.3°C | 146 mm |
| March | 6°C | −2°C | 1.6°C | 151 mm |
| April | 11°C | 0°C | 5.6°C | 104 mm |
| May | 17°C | 4°C | 10.4°C | 122 mm |
| June | 19°C | 9°C | 13.9°C | 88 mm |
| July | 20°C | 11°C | 15.4°C | 120 mm |
| August | 19°C | 10°C | 14.6°C | 223 mm |
| September | 15°C | 7°C | 11.2°C | 284 mm |
| October | 9°C | 3°C | 5.7°C | 306 mm |
| November | 3°C | −1°C | 0.9°C | 305 mm |
| December | 0°C | −4°C | −2.2°C | 219 mm |
NOAA publishes no 1991-2020 snowfall normal for this station, and no record within 25 miles keeps one, so snow is left out here rather than estimated.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00503821; 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 Hyder?
Normal highs sit between 65°F and 85°F in June, July and August.
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 USC00503821.
When is the last frost in Hyder?
In Hyder, the last spring frost (32°F) comes after May 4 in half of years and after May 23 in one year in ten; the first autumn frost comes before October 11 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 41 year in 10 after May 23; 9 in 10 after April 22
- First autumn frost, half of years before
- October 111 year in 10 before October 1; 9 in 10 before October 24
NOAA puts the median frost-free season at 157 days, and the season without a hard freeze (28°F) at 185 days.
A hard freeze (28°F) comes after April 22 in half of springs and before October 25 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Hyder in zone 6b in ZIP code 99923.
Frost dates for every NOAA station in Alaska · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00503821; 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 Hyder?
In a normal year in Hyder, 1 day a year reaches 90°F and 152 nights fall to 32°F or colder.
- Days at 90°F or more
- 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 152a normal year
- Days that stay below freezing
- 44high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00503821.
How sunny is Hyder?
Over a year 55% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Hyder, 2.4 kWh per square metre a day. May is the sunniest month (59%) and November the cloudiest (44%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 45% | 0.5 |
| February | 56% | 1.3 |
| March | 54% | 2.2 |
| April | 58% | 3.6 |
| May | 59% | 4.5 |
| June | 55% | 4.6 |
| July | 54% | 4.2 |
| August | 57% | 3.6 |
| September | 54% | 2.4 |
| October | 50% | 1.3 |
| November | 44% | 0.6 |
| December | 45% | 0.3 |
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 Hyder need?
A normal year in Hyder brings 8,048 heating degree days, 50% more than the median U.S. place (5,373), and 22 cooling degree days, 98% fewer than the median (908). Nine months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 947 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,184 | 0 |
| February | 988 | 0 |
| March | 933 | 0 |
| April | 690 | 0 |
| May | 440 | 0 |
| June | 245 | 6 |
| July | 176 | 10 |
| August | 216 | 5 |
| September | 389 | 0 |
| October | 704 | 0 |
| November | 938 | 0 |
| December | 1,145 | 0 |
| Year (annual) | 8,048 | 22 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00503821. 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 Hyder been warmer than normal lately?
2021 averaged 41.6°F, 1.3°F below the 1991-2020 normal of 42.9°F.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 41.6°F | −1.3°F | – |
Source: observed years: ACIS, station USC00503821. A year counts only with all twelve months complete.
How does Hyder's climate compare?
Hyder is warmer than 73 of the other 84 places with their own NOAA record in Alaska, and wetter than 64. Across the 7,247 U.S. stations with normals, its annual mean of 42.9°F is warmer than 12%.
In the Köppen classification computed from these normals, Hyder is Dfb: continental, no dry season, warm 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 Hyder's climate
What is the coldest month in Hyder?
January, with a normal high of 31°F and a normal low of 22°F. The warmest is July (68°F by day, 51°F at night).
What is the rainiest month in Hyder?
October, with 12.06 in of precipitation in a normal year; the driest is June with 3.48 in.
What plant hardiness zone is Hyder in?
The USDA's 2023 map puts Hyder in zone 6b in ZIP code 99923.
How late can frost come in Hyder?
In half of years the last 32°F night comes after May 4; in one year in ten it comes after May 23. Waiting until May 23 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Alaska climateThe statewide normals and every place in the state
- Ketchikan, AK76 miles from this station, 46.0°F a year
- Metlakatla, AK86 miles from this station, 45.7°F a year
- Annette Island Airport, AK86 miles from this station, 47.7°F a year
- Thorne Bay, AK98 miles from this station, 44.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made