Randolph, MA frost dates
Last spring frostApr 18median date
First fall frostOct 26median date
Growing season191 daysfrost-free
Hardiness zone6bZone 6b
How Randolph compares
- In 8 years out of 10, the last spring frost in Randolph falls between April 7 and April 30, a 23-day window. The first fall frost falls between October 9 and November 8.
- The median last frost is 9 days earlier than the Massachusetts median of Apr 27.
- Its 191-day growing season is longer than 84% of the 510 Massachusetts places with a regular frost season (state median 169 days).
- The last frost is 4 days earlier than the zone 6b median of Apr 22. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6b chart.
- The weather station records an average of 121 nights a year at or below 32°F.
- Compared with Weymouth, MA, 9 km away, the last frost here is 7 days earlier than there and the growing season is 11 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 7 |
| 50% (median) | April 18 |
| 10% (safe for tender plants) | April 30 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 9 |
| 50% (median) | October 26 |
| 90% (late) | November 8 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Randolph, MA
Randolph, MA frost dates — last frost Apr 18, first frost Oct 26, zone 6b. whenisthelastfrost.com
Crop
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Start indoors: Jan 24 to Feb 7Transplant outside: Mar 21 to Apr 4
Start indoors: Feb 7 to Feb 21Transplant outside: May 2 to May 16
Start indoors: Feb 7 to Feb 21Transplant outside: May 2 to May 16
Start indoors: Feb 21 to Mar 7Transplant outside: Apr 25 to May 9
Start indoors: Feb 21 to Mar 7Transplant outside: Mar 28 to Apr 11Sow outdoors: Mar 21 to Apr 25Plant for fall: Aug 31 to Sep 28
Start indoors: Feb 21 to Mar 7Transplant outside: Mar 21 to Apr 4Sow outdoors: Mar 21 to Apr 4Plant for fall: Aug 17 to Sep 7
Start indoors: Feb 21 to Mar 7Transplant outside: Apr 4 to Apr 18Plant for fall: Jul 20 to Aug 10
Start indoors: Feb 21 to Mar 7Transplant outside: Mar 28 to Apr 11Plant for fall: Jul 20 to Aug 10
Start indoors: Feb 21 to Mar 7Transplant outside: Apr 4 to Apr 18Plant for fall: Jul 20 to Aug 10
Start indoors: Mar 7 to Mar 21Transplant outside: May 9 to May 23Sow outdoors: May 9 to May 23
Start indoors: Mar 7 to Mar 21Transplant outside: Apr 25 to May 9
Sow outdoors: Mar 7 to Mar 28Plant for fall: Aug 3 to Aug 24
Sow outdoors: Mar 7 to Mar 28Plant for fall: Aug 31 to Sep 21
Sow outdoors: Mar 14 to Apr 25Plant for fall: Sep 14 to Oct 5
Start indoors: Mar 21 to Mar 28Transplant outside: May 2 to May 9Sow outdoors: Apr 25 to May 9Plant for fall: Aug 10 to Aug 24
Start indoors: Mar 21 to Mar 28Sow outdoors: Apr 25 to May 9Plant for fall: Aug 17 to Aug 31
Start indoors: Mar 21 to Mar 28Sow outdoors: Apr 25 to May 9
Start indoors: Mar 21 to Mar 28Transplant outside: May 2 to May 16
Sow outdoors: Mar 28 to Apr 25Plant for fall: Aug 3 to Aug 17
Sow outdoors: Mar 28 to Apr 25Plant for fall: Aug 17 to Aug 31
Sow outdoors: Mar 28 to Apr 18
Sow outdoors: Apr 4 to May 2Plant for fall: Aug 17 to Aug 31
Sow outdoors: Apr 4 to Apr 25Plant for fall: Aug 31 to Sep 21
Sow outdoors: Apr 25 to May 16Plant for fall: Aug 10 to Aug 24
Sow outdoors: Apr 25 to May 9
Transplant outside: May 2 to May 23
Plant for fall: Oct 12 to Nov 16
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Randolph, MA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 24 – Feb 7 | Mar 21 – Apr 4 | — | — |
| Peppers | Feb 7 – Feb 21 | May 2 – May 16 | — | — |
| Eggplant | Feb 7 – Feb 21 | May 2 – May 16 | — | — |
| Tomatoes | Feb 21 – Mar 7 | Apr 25 – May 9 | — | — |
| Lettuce | Feb 21 – Mar 7 | Mar 28 – Apr 11 | Mar 21 – Apr 25 | Aug 31 – Sep 28 |
| Kale | Feb 21 – Mar 7 | Mar 21 – Apr 4 | Mar 21 – Apr 4 | Aug 17 – Sep 7 |
| Broccoli | Feb 21 – Mar 7 | Apr 4 – Apr 18 | — | Jul 20 – Aug 10 |
| Cabbage | Feb 21 – Mar 7 | Mar 28 – Apr 11 | — | Jul 20 – Aug 10 |
| Cauliflower | Feb 21 – Mar 7 | Apr 4 – Apr 18 | — | Jul 20 – Aug 10 |
| Okra | Mar 7 – Mar 21 | May 9 – May 23 | May 9 – May 23 | — |
| Basil | Mar 7 – Mar 21 | Apr 25 – May 9 | — | — |
| Peas | — | — | Mar 7 – Mar 28 | Aug 3 – Aug 24 |
| Spinach | — | — | Mar 7 – Mar 28 | Aug 31 – Sep 21 |
| Radishes | — | — | Mar 14 – Apr 25 | Sep 14 – Oct 5 |
| Cucumbers | Mar 21 – Mar 28 | May 2 – May 9 | Apr 25 – May 9 | Aug 10 – Aug 24 |
| Zucchini & Summer Squash | Mar 21 – Mar 28 | — | Apr 25 – May 9 | Aug 17 – Aug 31 |
| Winter Squash & Pumpkins | Mar 21 – Mar 28 | — | Apr 25 – May 9 | — |
| Melons & Watermelon | Mar 21 – Mar 28 | May 2 – May 16 | — | — |
| Carrots | — | — | Mar 28 – Apr 25 | Aug 3 – Aug 17 |
| Beets | — | — | Mar 28 – Apr 25 | Aug 17 – Aug 31 |
| Potatoes | — | — | Mar 28 – Apr 18 | — |
| Swiss Chard | — | — | Apr 4 – May 2 | Aug 17 – Aug 31 |
| Cilantro | — | — | Apr 4 – Apr 25 | Aug 31 – Sep 21 |
| Green Beans | — | — | Apr 25 – May 16 | Aug 10 – Aug 24 |
| Sweet Corn | — | — | Apr 25 – May 9 | — |
| Sweet Potatoes | — | May 2 – May 23 | — | — |
| Garlic | — | — | — | Oct 12 – Nov 16 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Blue Hill Coop, MA weather station, 7 km away (elevation 627 ft (191 m)).
Frost dates near Randolph
- Braintree Apr 18 · Oct 26
- Holbrook Apr 22 · Oct 19
- Avon Apr 22 · Oct 19
- Canton Apr 25 · Oct 9
- Stoughton Apr 25 · Oct 9
- Dedham Apr 18 · Oct 26
- South Weymouth Apr 25 · Oct 22
- Weymouth Apr 25 · Oct 22
- Milton Apr 18 · Oct 26
- Readville Apr 18 · Oct 26
Frequently asked questions
When is the last frost in Randolph, MA?
The median last spring frost in Randolph, MA is April 18. There is still about a 10% chance of frost after April 30, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Randolph, MA?
The median first fall frost is October 26, with about a 10% chance of frost before October 9.
How long is the growing season in Randolph, MA?
About 191 days between the median last spring frost and first fall frost.
What planting zone is Randolph, MA?
Randolph, MA is in USDA hardiness zone 6b.