Lynn in Summer
In summer (June, July and August), Lynn sees average daytime highs around 76°F and overnight lows near 63°F, with 9.7 in of rain over about 29 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 68°F in early June to 75°F by late August. The sky is clear or mostly clear about 30% of the time across summer, and the air most often feels humid.
Summer is Lynn's best season of the year to visit on our travel score. For the whole year in context, see Lynn's year-round climate.
- Avg daytime high
- 76°F
- warmest season of the year
- Avg overnight low
- 63°F
- Rainfall
- 9.7 in
- 29 wet days
- Avg wind
- 7 mph
- Travel score
- 6.8
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Lynn in Summer
Over the season highs climb from about 68°F in early June to 75°F by late August.
A typical summer day in Lynn reaches about 76°F and drops to 63°F overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Lynn
Once humidity and wind are folded in, summer brings about 0 days that feel above 90°F and 0 that feel at or below 32°F.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Lynn weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 35° / 23° | 3.6 | 10 | 5.8 | 9.2 | 0.0 |
| Feb | 37° / 24° | 3.3 | 9 | 5.3 | 10.3 | 0.0 |
| Mar | 43° / 31° | 4.5 | 11.3 | 4.5 | 11.6 | 0.6 |
| Apr | 53° / 40° | 4.1 | 10.7 | 1.1 | 13.1 | 3.0 |
| May | 63° / 49° | 3.3 | 10.7 | 0 | 14.4 | 5.3 |
| Jun | 72° / 59° | 3.5 | 10.3 | 0 | 15.1 | 6.5 |
| Jul | 78° / 65° | 2.9 | 9.9 | 0 | 14.8 | 6.8 |
| Aug | 77° / 64° | 3.3 | 9 | 0 | 13.7 | 7.1 |
| Sep | 70° / 58° | 3.4 | 8.2 | 0 | 12.3 | 6.9 |
| Oct | 60° / 47° | 4.3 | 10.1 | 0.2 | 10.8 | 4.9 |
| Nov | 50° / 38° | 3.8 | 9.6 | 0.8 | 9.6 | 2.2 |
| Dec | 40° / 29° | 4.5 | 10.5 | 4.5 | 8.9 | 0.2 |
Cloud cover in Summer
The sky is clear or mostly clear about 30% of the time across summer.
Chance of precipitation in Summer
Lynn gets around 9.7 in of rain over 29 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 7 mph across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 54 min in early June to 13 h 06 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.7 kWh/m².
Hazard calendar for Lynn
In summer, Lynn overlaps its atlantic hurricane season. The full year is below, with each hazard's peak months called out.
Lynn sits in the Atlantic hurricane belt; the season peaks August–October.
Is summer a good time to visit Lynn?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Lynn for sightseeing.
What to pack for Lynn in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Lynn sees daytime highs around 76°F and nights near 63°F. Worth packing: light clothes, rain gear and sun protection. About 29 days see rain.
Sea temperature near Lynn in Summer
The nearest coast averages about 63°F across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in August at about 66°F and coldest in February near 38°F.
The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 41 | 38 | 38 | 42 | 50 | 58 | 65 | 66 | 63 | 56 | 50 | 46 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Cool | Bracing | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 41 | Bracing |
| Feb | 38 | Bracing |
| Mar | 38 | Bracing |
| Apr | 42 | Bracing |
| May | 50 | Bracing |
| Jun | 58 | Bracing |
| Jul | 65 | Cool |
| Aug | 66 | Cool |
| Sep | 63 | Cool |
| Oct | 56 | Bracing |
| Nov | 50 | Bracing |
| Dec | 46 | Bracing |
UV index in Lynn in Summer
Clear-sky midday UV across summer averages around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Lynn peaks around July 10 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 3 | 4 | 5 | 7 | 7 | 7 | 5 | 6 | 3 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | Very high | Very high | Very high | Moderate | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 3 | Moderate |
| Mar | 4 | Moderate |
| Apr | 5 | High |
| May | 7 | Very high |
| Jun | 7 | Very high |
| Jul | 7 | Very high |
| Aug | 5 | Moderate |
| Sep | 6 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Moderate |
| Dec | 1 | Low |
Air quality in Lynn in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Lynn is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 8 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 9 | 13 | 13 | 13 | 14 | 13 | 16 | 14 | 11 | 9 | 8 | 9 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 9 | Good |
| Feb | 13 | Moderate |
| Mar | 13 | Moderate |
| Apr | 13 | Moderate |
| May | 14 | Moderate |
| Jun | 13 | Moderate |
| Jul | 16 | Moderate |
| Aug | 14 | Moderate |
| Sep | 11 | Good |
| Oct | 9 | Good |
| Nov | 8 | Good |
| Dec | 9 | Good |
Where is Lynn?
Lynn sits at 42.5°N, 70.9°W, 39 ft above sea level, in United States. The nearest listed city is South Peabody, 3.1 mi away.
Topography around Lynn
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Lynn.
Within 2 miles, the terrain around Lynn has only modest variations in elevation — a maximum elevation change of 230 ft around an average of 49 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 427 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,018 ft.
The land around Lynn is covered by artificial surfaces (38%), water (29%) and trees (25%) within 2 miles, water (43%) and trees (34%) within 10 miles, and trees (58%) and water (33%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Lynn (42.4668°, -70.9495°, elevation 39 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.