Frost dates for First Connecticut Lake, NH
When the last spring frost and first fall frost usually come, and when to plant, from 30 years of NOAA weather records.
Last spring frost
May 25
typical year
Safe to plant
June 8
frost is over in 9 of 10 years
First fall frost
September 24
typical year
Growing season
121 days
frost-free, typical year
Frost watch this week
Tonight's and the next six nights' lows from the National Weather Service forecast for the station's location. Frost: 32°F or colder. Possible frost: 33–36°F, mostly in low spots on clear, still nights.
When to plant
Counted from this page's frost dates. Warm-season crops wait for the safe-to-plant date.
| Crop | Start indoors | Plant outside | Fall planting |
|---|---|---|---|
| Cool-season crops | |||
| Peas | – | Apr 27 – May 11 | – |
| Spinach | – | Apr 13 – May 4 | Jul 30 – Aug 13 |
| Lettuce | – | Apr 27 – May 18 | Jul 30 – Aug 13 |
| Radishes | – | Apr 27 – Jun 8 | Aug 13 – 27 |
| Onions | – | Apr 27 – May 11 | – |
| Potatoes | – | May 4 – 18 | – |
| Carrots | – | May 4 – 25 | Jul 2 – 16 |
| Beets | – | Apr 27 – May 11 | Jul 16 – 30 |
| Kale | Mar 16 – 30 | Apr 27 – May 11 | Jul 16 – 30 |
| Broccoli | Mar 16 – 30 | May 11 – 25 | Jul 16 – 30 |
| Cabbage | Mar 2 – 16 | Apr 27 – May 11 | Jul 16 – 30 |
| Garlic | – | – | Aug 13 – Sep 3 |
| Warm-season crops | |||
| Tomatoes | Apr 13 – 27 | Jun 8 – 22 | – |
| Peppers | Apr 6 – 20 | Jun 15 – 29 | – |
| Cucumbers | – | Jun 8 – 29 | – |
| Zucchini | – | Jun 8 – Jul 6 | – |
| Pumpkins | – | Jun 8 – 29 | – |
| Green beans | – | Jun 8 – Jul 16 | – |
| Sweet corn | – | Jun 8 – Jul 6 | – |
| Basil | May 4 – 18 | Jun 15 – 22 | – |
Onions: from sets. Green beans: until 10 weeks before the first fall frost. Garlic: harvest next summer.
The year at a glance
Start indoors Plant outside Fall planting
The chance of frost, by date
| 1 year in 10 | Half of years | 9 years in 10 | |
|---|---|---|---|
| Spring frost after | June 8 | May 25 | May 9 |
| Fall frost before | September 9 | September 24 | October 7 |
Frost here means 32°F or colder. Read across: in 1 year in 10, spring frost carries on past the first date, which is why that date is the safe-to-plant date.
Hard freeze (28°F)
A hard freeze kills most garden plants, even hardy ones. The last one in spring usually comes around May 9 (May 27 in a late year), and the first one in fall around October 5.
Where these dates come from
NOAA weather station FIRST CONNECTICUT LAKE, NH US (USC00272999), 1991–2020 climate normals. It's the nearest station for 1 zip code, all within 2 miles:
03592
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.