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Mentasta Lake, AK Weather
Mentasta Lake, Alaska sits at 63.0117, -143.5615. Its warmest month is July, when the day usually reaches 54F, and its coldest is December, when the night usually falls to -15F. June is the wettest, with rain on about 21 days. 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 Mentasta Lake weather
Mentasta Lake sits at 63.0117, -143.5615 and covers about 300.626 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: the Open-Meteo historical archive, which is ERA5 reanalysis: modelled estimates fitted to observations for this point, used here because no qualifying weather station sits within reach. Close to a station reading and not the same thing as one.
- Daily history search: the Open-Meteo historical archive, reanalysis for this point.
What the weather is usually like in Mentasta Lake
Mentasta Lake is warmest in July, when the day usually reaches 54F, and coldest in December, when the night usually falls to -15F. June is the wettest month, with rain on about 21 days of it.
The same year as numbers
| Month | Usual high | Usual low | Rain days | Snow days |
|---|---|---|---|---|
| January | -3F | -14F | 13 | 11 |
| February | 2F | -12F | 13 | 12 |
| March | 12F | -5F | 12 | 11 |
| April | 25F | 6F | 12 | 10 |
| May | 37F | 22F | 19 | 13 |
| June | 51F | 33F | 21 | 1 |
| July | 54F | 39F | 19 | 0 |
| August | 49F | 35F | 21 | 1 |
| September | 37F | 25F | 19 | 6 |
| October | 21F | 9F | 16 | 14 |
| November | 1F | -11F | 13 | 11 |
| December | -4F | -15F | 14 | 13 |
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.
Mentasta Lake weather history, back to 1940
Pick any month back to 1940 and see what the archive holds for Mentasta Lake: the reanalysis record of what happened, day by day.
Reading this month last year to start you off.
Common questions about Mentasta Lake weather
What is the weather usually like in Mentasta Lake, AK?
Mentasta Lake is warmest in July, when the day usually reaches 54F, and coldest in December, when the night usually falls to -15F. Rain falls on roughly 192 days a year, most often in June. 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 Mentasta Lake, AK?
About 192 days a year see at least a hundredth of an inch, which is the Weather Service's measurable-precipitation mark. June is the wettest month with rain on about 21 of its days, and March the driest with about 12.
Does it snow in Mentasta Lake, AK?
Yes. Snow falls on about 103 days a year, most often in October, which averages about 14 snowy days. Those are days with measurable snowfall, not days with snow lying on the ground.
Can I look up past weather for Mentasta Lake, 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 Mentasta Lake 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.