Frost Dates for 52531 — Albia, Iowa

Half of springs at Albia 3 NNE, IA see their last 32°F night by April 24; only one in ten is past it by April 8, and one in ten still has one after May 9. Planting tender crops after May 1 leaves a 30% risk of a frost on them, after May 4 20%, and after May 9 10%. The 15 days between the even-odds date and the one-in-ten date is wider than at 82% of the 132 Iowa stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 16 in half of years, as early as September 29 one year in ten, and holds off past October 28 one year in ten. A hard freeze of 28°F follows 10 days later, around October 26; in spring the one-in-ten date for 28°F is April 29, 10 days before the 32°F one. The freeze-free season lasts 173 days in a typical year, longer than at 76% of the 132 Iowa stations; it reaches 192 days one year in ten and falls short of 150 one year in ten. On average 135 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 10 days longer, to about May 4, and return around October 4. Severe cold of 16°F or below comes every winter, usually between November 21 and March 14.

July is the warmest month at Albia 3 NNE, IA, averaging 84°F by day and 65°F at night; January is the coldest at 31°F and 13°F. A freezing night is all but certain in every month from October to April (a 90% chance or more). From June to August the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 32% of years.

Warmth for growing adds up to 3,213 growing degree days a year (base 50°F), more than at 74% of the 132 Iowa stations. 34% of them (1,109) have built up by the end of June, and July adds the most, 759. Precipitation totals 36.5 inches a year, most in June (5.2") and least in January (1.1"); May to September bring 59% of it.

The nearest other station, Ottumwa Industrial Airport, IA, 19 miles east of Albia, has a last frost 1 day earlier (April 23), a first frost 2 days earlier (October 14), a season 1 day shorter.

The first measurable snow (0.1 inch or more) in Albia usually arrives around November 23, and the last of the season around March 20. Those are the middle dates across the winters of 1991–2020 at Albia 3 NNE, IA, 2.7 miles away: half of years saw snow earlier, half later. Every one of those winters saw snow. The last 32°F night of spring typically comes 35 days after the last snow.

ZIP 52531 is 3 miles from Albia 3 NNE, IA, which stands at 880 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 52531 in zone 5b, the band where the coldest night of the year averaged -15 to -10°F (-26.1 to -23.3°C) over 1991–2020; a zone describes winter lows, not frost dates.