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Port Heiden, AK Weather
Port Heiden, Alaska sits at 56.9652, -158.5864. Its warmest month is July, when the day usually reaches 56F, and its coldest is January, when the night usually falls to 24F. December is the wettest, with rain on about 26 days. The hottest day in the station record is 87F on July 11, 1971, and the coldest night -26F on March 7, 1971. This page carries live conditions, an hour by hour timeline, a ten day outlook, radar, monthly averages and searchable daily history back to 1940.
About Port Heiden weather
Port Heiden sits at 56.9652, -158.5864 and covers about 46.765 square miles. The forecast above is live: current conditions lead with the HRRR model, corrected against the nearest reporting station and against radar overhead, because a model can lag a storm and the radar cannot.
The tabs at the top of this page carry the hour by hour timeline, the ten day outlook and live radar. Where the models disagree about a day, the rock says so on the day rather than quietly picking a winner.
The rock grades itself against what actually happened and publishes the result whether it flatters it or not. Those standings live in the Receipts.
- Current conditions and forecast: NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
- Warnings and alerts: the National Weather Service, passed through unchanged.
- Radar: NOAA MRMS merged reflectivity, rendered into tiles by myweatherrock.
- Monthly averages and records: computed by myweatherrock from NOAA GHCN-Daily station records at the nearest qualifying station, named on this page with its distance. Measurements, not estimates.
- Daily history search: the town's own NOAA GHCN-Daily station file, held on our server, measurements by day. Months the station missed fall back to the Open-Meteo historical archive (reanalysis), and the page says so when it does.
What the weather is usually like in Port Heiden
Port Heiden is warmest in July, when the day usually reaches 56F, and coldest in January, when the night usually falls to 24F. December is the wettest month, with rain on about 26 days of it.
The same year as numbers
| Month | Usual high | Usual low | Rain days | Snow days |
|---|---|---|---|---|
| January | 32F | 24F | 21 | 16 |
| February | 35F | 28F | 22 | 16 |
| March | 32F | 24F | 22 | 17 |
| April | 38F | 29F | 22 | 13 |
| May | 45F | 36F | 21 | 6 |
| June | 52F | 44F | 20 | 0 |
| July | 56F | 48F | 21 | 0 |
| August | 56F | 50F | 23 | 0 |
| September | 51F | 45F | 25 | 1 |
| October | 44F | 37F | 25 | 7 |
| November | 35F | 27F | 22 | 15 |
| December | 34F | 26F | 26 | 18 |
Computed from ERA5 reanalysis for this point, August 2020 to July 2025: modelled estimates fitted to observations, used because no qualifying station sits within reach. A rain day means at least a hundredth of an inch fell, the same measurable-precipitation mark the Weather Service uses. Source: Open-Meteo historical archive.
Port Heiden weather history, back to 1940
Pick any month back to 1940 and see what the archive holds for Port Heiden: the reanalysis record of what happened, day by day.
Reading this month last year to start you off.
Port Heiden weather records
In 46,281 days of observations Port Heiden has been as hot as 87F and as cold as -26F. Not averages: the actual days.
NOAA GHCN daily station records, observed 1942 to 1988: temperature at the Port Heiden station, 1.6 miles away. Station measurements, not estimates. Record dates reflect the station's own observation schedule, and the official state record may live at a different station.
Common questions about Port Heiden weather
What is the weather usually like in Port Heiden, AK?
Port Heiden is warmest in July, when the day usually reaches 56F, and coldest in January, when the night usually falls to 24F. Rain falls on roughly 270 days a year, most often in December. Averages are computed from ERA5 reanalysis for this point, August 2020 to July 2025, because no qualifying station sits within reach.
How much does it rain in Port Heiden, AK?
About 270 days a year see at least a hundredth of an inch, which is the Weather Service's measurable-precipitation mark. December is the wettest month with rain on about 26 of its days, and June the driest with about 20.
Does it snow in Port Heiden, AK?
Yes. Snow falls on about 109 days a year, most often in December, which averages about 18 snowy days. Those are days with measurable snowfall, not days with snow lying on the ground.
What is the hottest it has ever been in Port Heiden, AK?
The hottest day measured for Port Heiden reached 87F on July 11, 1971, and the coldest night -26F on March 7, 1971. Both are real NOAA station measurements from the GHCN daily archive, observed 1942 to 1988, at the Port Heiden station. Not estimates, though the official state record may live at a different station.
Can I look up past weather for Port Heiden, AK?
Yes, and for free. The History tab on this page takes any month back to 1940 and shows every day of it: the high, the low, what fell, and that month's hottest and coldest day. No account and no payment.
Is the Port Heiden forecast on this page free, and does it track me?
It is free, carries no advertising, and needs no account. Nothing about a visitor leaves the device except the coordinates needed to fetch a forecast, and those are not stored against anyone.