Last and first frost dates in Augusta

When is the last frost in Augusta?

The last frost in Augusta usually comes around 23 April: that is the median of 2016–2025, so in about half of those years the last night at or below 0 °C came later. Hardy crops start before it and frost-tender ones only after it: in the table below arugula can go into open ground from 2 April, while corn waits until 19 May. The first autumn frost follows around 3 November, about 194 days later: harvest or cover frost-tender crops before then.

When to sow and plant

Planting out: a week after the last frost once the soil is warm enough for the crop; frost-hardy crops three weeks before it; an unheated greenhouse three weeks earlier. Seedlings are sown so they are ready on that day. Each window starts on the Greenly calendar date and ends on the last day that still leaves the crop’s days to harvest (from its card) before the average first autumn frost, plus six weeks of picking for crops harvested over weeks (tomatoes, peppers, aubergines, cucumbers, courgettes, pumpkins, watermelons, beans) — our rule; earlier in the window is safer.

When the soil warms up in Augusta

The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo). The soil reaches 10 °C 21 days after the last spring frost and 15 °C 34 days after it.

Frost dates near Augusta

Of the nearest cities on our list, the last spring frost ends earliest in Portland, Maine (15 April) and latest in Sherbrooke (8 May).

Seeds, seedlings and markets in Augusta

Within 15 km of Augusta OpenStreetMap lists 2 garden centres and 3 markets (collected 28 October 2026). The nearest garden centre to the city centre is Longfellow's Greenhouses, 7 km away.

• Longfellow's Greenhouses — garden centre
  Puddledock Road 81, 04351 Manchester · Mon–Sun 08:00–17:00 · 7 km
• Al Naeem Market — market
  Water Street 339, 04330 Augusta · 1 km
• Hallowell Seafood and Produce — market
  Water Street 197, 04347 Hallowell · Mon–Sun 08:00–18:00 · 3 km · hallowellseafoodandproduce.com
• Emery's Meat and Produce — market
  Bridge Street 35, 04345 Gardiner · 9 km · emerysmeatandproduce.com

• Where to buy seeds and seedlings in Augusta
• Selling your own harvest in the United States

Places: © OpenStreetMap contributors, ODbL.

Weather in Augusta by month

Average weather in Augusta over 2016–2025: the warmest month is July. Months that average 20 °C or more by day: June–September (22.2–27.3 °C). Nights average below 0 °C in December–March (-9.3–-4.4 °C). About 1182 mm of rain falls in a year, on 127 days; December is the wettest month (128 mm) and February the driest (77 mm).

Average of the daily highs and lows, rain per month and days with at least 1 mm (ERA5 via Open-Meteo, the same grid cell as the frost dates).

Planted in autumn

From a month before the first autumn frost, so the roots grow before winter, to the late-planting limit on each crop’s page (about two weeks before the ground freezes, by ten years of weather).