Laconia, New Hampshire climate: Normal weather by month, frost dates and records
Laconia's normal year runs from 12°F January nights to 82°F July afternoons, with 45.6 inches of precipitation and 62 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.3°C, January lows of −11°C, July highs of 28°C, 1,158 mm of precipitation a year.
- NOAA stationLakeport 2
- Station IDUSC00274480
- Location43.55°N 71.46°W
- Elevation500 ft (152 m)
- From the center2 miles
- Population17,310
On October 14, the normal high in Laconia is 61°F and the normal low 41°F, and the chance of measurable rain or snow is 35%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Laconia.
- Jan 30° 12°
- Feb 34° 13°
- Mar 43° 21°
- Apr 56° 33°
- May 68° 45°
- Jun 77° 55°
- Jul 82° 60°
- Aug 81° 59°
- Sep 73° 52°
- Oct 60° 40°
- Nov 47° 30°
- Dec 36° 20°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Laconia each month?
July is the warmest month, with normal highs of 82°F; January the coldest, with normal lows of 12°F. The most precipitation falls in October (4.83 in), the least in February (2.88 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 30°F | 12°F | 21.0°F | 3.08 | 18.8 | 12 | <1 | 30 | 9 h 20 min |
| February | 34°F | 13°F | 23.1°F | 2.88 | 16.9 | 9 | <1 | 27 | 10 h 30 min |
| March | 43°F | 21°F | 31.8°F | 3.39 | 9.4 | 11 | <1 | 28 | 11 h 50 min |
| April | 56°F | 33°F | 44.1°F | 3.65 | 1.6 | 11 | <1 | 14 | 13 h 20 min |
| May | 68°F | 45°F | 56.3°F | 3.47 | 0.0 | 12 | <1 | 1 | 14 h 40 min |
| June | 77°F | 55°F | 65.7°F | 4.44 | 0.0 | 13 | 2 | <1 | 15 h 20 min |
| July | 82°F | 60°F | 71.3°F | 4.61 | 0.0 | 11 | 4 | <1 | 15 h 10 min |
| August | 81°F | 59°F | 69.8°F | 3.89 | 0.0 | 10 | 2 | <1 | 14 h |
| September | 73°F | 52°F | 62.4°F | 3.77 | 0.0 | 10 | 1 | <1 | 12 h 30 min |
| October | 60°F | 40°F | 50.0°F | 4.83 | 0.3 | 11 | <1 | 5 | 11 h 10 min |
| November | 47°F | 30°F | 38.7°F | 3.68 | 2.1 | 11 | <1 | 18 | 9 h 40 min |
| December | 36°F | 20°F | 28.2°F | 3.92 | 12.8 | 12 | <1 | 28 | 9 h |
| Year (annual) | 57°F | 37°F | 46.9°F | 45.61 | 61.9 | 132 | 9 | 150 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −1°C | −11°C | −6.1°C | 78 mm | 48 cm |
| February | 1°C | −11°C | −4.9°C | 73 mm | 43 cm |
| March | 6°C | −6°C | −0.1°C | 86 mm | 24 cm |
| April | 13°C | 0°C | 6.7°C | 93 mm | 4 cm |
| May | 20°C | 7°C | 13.5°C | 88 mm | 0 cm |
| June | 25°C | 13°C | 18.7°C | 113 mm | 0 cm |
| July | 28°C | 16°C | 21.8°C | 117 mm | 0 cm |
| August | 27°C | 15°C | 21.0°C | 99 mm | 0 cm |
| September | 23°C | 11°C | 16.9°C | 96 mm | 0 cm |
| October | 16°C | 4°C | 10.0°C | 123 mm | 1 cm |
| November | 8°C | −1°C | 3.7°C | 93 mm | 5 cm |
| December | 2°C | −7°C | −2.1°C | 100 mm | 33 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00274480; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Laconia?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September has the fewest days with rain (10).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00274480.
When is the last frost in Laconia?
In Laconia, the last spring frost (32°F) comes after April 30 in half of years and after May 13 in one year in ten; the first autumn frost comes before October 18 in half of years and before October 4 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 301 year in 10 after May 13; 9 in 10 after April 19
- First autumn frost, half of years before
- October 181 year in 10 before October 4; 9 in 10 before November 3
NOAA puts the median frost-free season at 170 days, and the season without a hard freeze (28°F) at 196 days.
A hard freeze (28°F) comes after April 17 in half of springs and before November 1 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Laconia in zone 5b in ZIP code 03246. By the map's own method, the average of each year's coldest night over 1991-2020, Laconia's NOAA station is in zone 6a: the coldest night of a typical year reaches −8°F (30 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in New Hampshire · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00274480; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Laconia?
In a normal year in Laconia, 9 days a year reach 90°F, 150 nights fall to 32°F or colder and 132 days bring measurable precipitation.
- Days at 90°F or more
- 9a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 150a normal year
- Days that stay below freezing
- 47high of 32°F or less
- Days with 0.01 inch of precipitation
- 132a normal year
- Days with 1 inch of snow or more
- 19a normal year
The highest temperature in this station's record (since 1938) is 100°F, on August 18, 1987; the lowest is −24°F, on January 21, 1994.
The wettest calendar year on that record is 2005, with 61.89 in; the snowiest season is 1970–71, with 122.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00274480; records: ACIS (NOAA Regional Climate Centers), station USC00274480. Records use complete months only; a month missing more than three days is left out.
How sunny is Laconia?
Over a year 70% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Laconia, 3.7 kWh per square metre a day. August is the sunniest month (77%) and December the cloudiest (62%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 66% | 1.7 |
| February | 68% | 2.5 |
| March | 68% | 3.6 |
| April | 68% | 4.6 |
| May | 67% | 5.2 |
| June | 70% | 5.6 |
| July | 76% | 5.8 |
| August | 77% | 5.2 |
| September | 77% | 4.2 |
| October | 66% | 2.7 |
| November | 66% | 1.8 |
| December | 62% | 1.3 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Laconia need?
A normal year in Laconia brings 7,103 heating degree days, 32% more than the median U.S. place (5,373), and 529 cooling degree days, 42% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,482 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,364 | 0 |
| February | 1,173 | 0 |
| March | 1,028 | 0 |
| April | 626 | 1 |
| May | 287 | 16 |
| June | 71 | 92 |
| July | 9 | 203 |
| August | 16 | 163 |
| September | 130 | 52 |
| October | 468 | 3 |
| November | 791 | 0 |
| December | 1,141 | 0 |
| Year (annual) | 7,103 | 529 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00274480. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Laconia been warmer than normal lately?
2025 averaged 47.1°F, 0.2°F above the 1991-2020 normal of 46.9°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 49.3°F | +2.4°F | 47.97 | 43.5 |
| 2022 | 48.5°F | +1.6°F | 49.42 | 49.0 |
| 2023 | 49.6°F | +2.7°F | 56.64 | 75.4 |
| 2024 | 49.7°F | +2.8°F | 46.47 | 76.5 |
| 2025 | 47.1°F | +0.2°F | 36.51 | 62.0 |
Over 37 complete years from 1984 to 2025, the station's annual mean temperature rose at a fitted 6.4°F per century (+0.35°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00274480; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Laconia's climate compare?
Laconia is warmer than 18 of the other 27 places with their own NOAA record in New Hampshire, and wetter than 14. Across the 7,247 U.S. stations with normals, its annual mean of 46.9°F is warmer than 27%.
In the Köppen classification computed from these normals, Laconia is Dfb: continental, no dry season, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Laconia share this climate record?
2 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Wolfeboro, NH6,625 people · 13 mi E
- Belmont, NH7,428 people · 8 mi S
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Laconia's climate
What is the coldest month in Laconia?
January, with a normal high of 30°F and a normal low of 12°F. The warmest is July (82°F by day, 60°F at night).
Does it snow in Laconia?
Yes: 62 inches in a normal year, falling on 24 days with 0.1 inch or more, the most in January (18.8 inches).
What is the rainiest month in Laconia?
October, with 4.83 in of precipitation in a normal year; the driest is February with 2.88 in.
What plant hardiness zone is Laconia in?
The USDA's 2023 map puts Laconia in zone 5b in ZIP code 03246. By the same method at Laconia's NOAA station, the coldest night of a typical year reaches −8°F (30 years, 1991-2020): zone 6a.
How late can frost come in Laconia?
In half of years the last 32°F night comes after April 30; in one year in ten it comes after May 13. Waiting until May 13 leaves about a one-in-ten chance of a later frost.
Nearby and next
- New Hampshire climateThe statewide normals and every place in the state
- Meredith, NH10 miles from this station, 46.5°F a year
- Franklin, NH11 miles from this station, 45.2°F a year
- Plymouth, NH19 miles from this station, 43.4°F a year
- East Sandwich, NH19 miles from this station, 44.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made