Fort Yukon, AK 99788 Frost Dates

Fort Yukon, AK: when does the frost end?

The NOAA station nearest to 99788 does not report a usable frost-date normal for either event, so no last-frost or first-frost figure is shown here. The USDA hardiness zone below is still real: Zone 1a (-60 to -55°F average annual minimum).

Fort Yukon against the rest of the dataset

Fort Yukon's growing season runs about 58 days, ranking 40,199 of 40,283 US ZIP codes measured here, longest to shortest. Within AK, it ranks 262 of 269.

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Before leaning on 99788's figures: zone vs. frost date explains why Zone 1a and Fort Yukon's frost date answer different questions, while local microclimates explains what one yard in Fort Yukon can differ from the 99788 normal.