Manchester, New Hampshire Weather
Fireflies rise from the lawn. Day 76 of spring. Read this microseason across nine climate regions →
Manchester weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Clear——86°52°—
- ThursdayJun 4Overcast——86°60°0°
- FridayJun 5Overcast——84°58°-2°
- SaturdayJun 6Showers42%0.13″85°63°+1°
- SundayJun 7Showers71%0.22″67°52°-18°
- MondayJun 8Overcast30%—78°49°+11°
- TuesdayJun 9Overcast——83°52°+5°
Ozone at AQI 39 now. AQI flat over the last 6 hours (within ±3 points). With UV 0.2 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 9 by mid-afternoon.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 39 now. With UV 0.2 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 9 by mid-afternoon.
- Present
- AQI 39
- UV peak
- 0.2 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 9
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
The higher the clouds, the finer the weather.
- Moonrise
- 2:48 AM
- Moonset
- 11:29 AM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
Manchester at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: May 4 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 3, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | — | — |
| May | lettuce, peas, spinach, radishes | lettuce, peas, radishes |
| June | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | tomatoes, peppers, beans, squash, fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | — | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
July brings Manchester's warmest temperatures with a mean of 71°F, while January delivers the coldest at 22°F. October sees peak rainfall at 4.4 inches, contrasting with January's low of 2.7 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 22° | 2.7″ | 7 |
| February | 25° | 2.7″ | 6 |
| March | 33° | 3.2″ | 6 |
| April | 46° | 3.5″ | 7 |
| May | 57° | 3.4″ | 8 |
| June | 66° | 4.3″ | 8 |
| July | 71° | 3.6″ | 7 |
| August | 69° | 3.7″ | 6 |
| September | 62° | 3.9″ | 6 |
| October | 50° | 4.4″ | 7 |
| November | 39° | 3.5″ | 7 |
| December | 29° | 3.8″ | 7 |
Regional context
Manchester falls within a warm-summer humid continental climate region, sharing similar temperature ranges, seasonal patterns, and growing conditions with neighboring cities in this climate zone.
Similar climates: Nashua, NH, Portsmouth, NH, Dover, NH, Concord, NH, Rochester, NH.
Naturalist notes
Sugar maples begin their spring leaf-out in late May as soil temperatures warm consistently above 50°F.
American robins typically arrive from their southern wintering grounds in mid-March, marking one of the first reliable signs of spring's approach.
Frequently asked
- When does it freeze in Manchester?
- Spring's last frost usually occurs around mid-May in Manchester, while the first fall frost typically arrives around mid-October.
- What is the rainy season in Manchester?
- October records the highest monthly rainfall at approximately 4.4 inches, contributing to the city's annual total of roughly 43 inches.
- What is the warmest month in Manchester?
- July typically brings the warmest weather, with average temperatures around 71°F.
- What is the coldest month in Manchester?
- January registers as the coldest month, averaging approximately 22°F.
- When can I start a vegetable garden in Manchester?
- Cool-season crops like peas and lettuce can be planted around the last spring frost in mid-May, while warm-season crops such as tomatoes and peppers should wait 1–2 weeks after.
- How many rainy days does Manchester get?
- Manchester experiences approximately 81 rainy days annually.
- What hardiness zone is Manchester?
- Manchester's USDA hardiness zone depends on its lowest average winter temperatures; the USDA's online lookup tool can provide the current zone designation using the city's ZIP code.
Climate
Manchester, New Hampshire experiences a warm-summer humid continental climate. January temperatures typically hover near 22°F, while July averages reach 71°F, creating a 49°F seasonal swing.
Annual precipitation totals about 43 inches, falling across roughly 81 rainy days throughout the year.
Geography drives Manchester's weather patterns through its latitude of 43.0°N, proximity to large water bodies, and elevation. These factors determine what grows in the region, when frost threatens, and the daily weather patterns residents experience.