Photo: User:Magicpiano · CC BY-SA 4.0Hardly any U.S. towns see fresher July days than Dublin
In January the night’s low is typically 12°. The seasons are far apart: from a winter night to a summer afternoon the average spans 66°. Winter nights are cold: in January they are colder than in 91% of U.S. towns. For walks and days out, the stretch from May to September brings highs of 66–78°.
A year in Dublin at a glance
Each month’s typical high and low, and what it brings.
What stands out about Dublin’s climate
Compared with towns across the U.S., with Dublin’s place in New Hampshire beside it.
What a year in Dublin feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 152 frost-free days a year
In half of years the last 32° night comes by May 5 and the first by October 6. Day counts come from NOAA’s station at Jaffrey Silver Rch Airpark, NH, 6 miles from the town’s center, 310 ft lower; frost dates and degree days from Jaffrey Muni Airport, 7 miles away.
The 2023 USDA map puts Dublin’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −8°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 73 inches of snow a winter
Snow, measured at Fitzwilliam 2 W, NH, falls mostly in January. Precipitation (rain plus melted snow) adds up to 49 inches a year; October is the wettest month and February the driest. Rain or snow falls on about 104 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Dublin
94% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through May.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Jaffrey Muni Airport.
Living with Dublin’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
152 frost-free days in zone 6a. The last frost comes by May 5 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 6.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 26 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Dublin from natural hazards, river flooding is the largest share (63%); heat waves, cold waves, winter storms and ice storms together are 11%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Dublin and its neighbors
Peterborough the hottest July afternoons (81°, 3° warmer). Differences under a degree are within what the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Dublin’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Dublin, NH | 12° | 78° | 49" | 73" |
| Ellsworth, ME | 11° | 79° | 48" | 75" |
| Delhi, NY | 13° | 79° | 46" | 71" |
| Bradford, PA | 15° | 80° | 44" | 75" |
| Chardon, OH | 18° | 81° | 45" | 114" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Dublin averaged 1.9° warmer than the 1900s. The biggest change is in December (+3.6°).
A bigger shift than in 84% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Dublin compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Dublin’s place among New Hampshire’s.
Dublin weather by month
Highs, lows and precipitation from NOAA’s grid at Dublin’s center; snow, wet days and snow on the ground from Fitzwilliam 2 W, NH. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 30° | 12° | 3.5" | 22.3" | 10 | 25 | 11° – 28° |
| February | 33° | 13° | 3.2" | 16.1" | 7 | 24 | 9° – 30° |
| March | 41° | 21° | 3.6" | 16.3" | 8 | 21 | 24° – 41° |
| April | 54° | 32° | 3.8" | 2.4" | 7 | 4 | 39° – 47° |
| May | 66° | 42° | 3.9" | 0.1" | 10 | 0 | 49° – 60° |
| June | 73° | 51° | 4.6" | 0.0" | 10 | 0 | 60° – 66° |
| July | 78° | 57° | 4.5" | 0.0" | 9 | 0 | 63° – 71° |
| August | 77° | 55° | 4.4" | 0.0" | 8 | 0 | 63° – 70° |
| September | 69° | 48° | 4.3" | 0.0" | 8 | 0 | 54° – 63° |
| October | 57° | 38° | 5.2" | 0.2" | 9 | 0 | 43° – 54° |
| November | 45° | 28° | 3.8" | 1.8" | 8 | 3 | 33° – 42° |
| December | 35° | 18° | 4.4" | 13.3" | 9 | 17 | 20° – 37° |
| Year | 55° | 35° | 49.2" | 72.5" | 104 | 94 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 9° to 30°. June is the most reliable, staying within 6°.
Where Dublin’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Dublin’s center.
- Snow: Fitzwilliam 2 W, NH.
- Frost dates, heating and cooling: Jaffrey Muni Airport, 7 miles away.
- Freezing nights, 90° and 100° days: Jaffrey Silver Rch Airpark, NH, 6 miles from the town’s center, 310 ft lower; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Dublin’s climate
What is the weather like in Dublin?
A typical July afternoon reaches 78°, a January night drops to 12°, and about 73 inches of snow falls in a normal winter. Colder January nights than 91% of U.S. towns; cooler July afternoons than 96% of U.S. towns.
How cold does it get in Dublin in winter?
January nights average 12°. About 150 nights a year reach 32° or below and 10 reach 0° or below. In the coldest January of the last 30 years the month averaged 11°.
How much snow does Dublin get?
About 73 inches in a normal winter at Fitzwilliam 2 W, NH, most of it in January, with snow on the ground about 94 days a year.
How hot does it get in Dublin?
July, with a typical high of 78° and a low of 57°. About 9 days a year reach 90° (Jaffrey Muni Airport).
When is the first and last frost in Dublin?
In half of years the last spring frost (32°) comes by May 5 and the first fall frost by October 6, about 152 frost-free days, at Jaffrey Muni Airport.
What growing zone is Dublin in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −8°.
What is the best time of year to visit Dublin?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Dublin getting warmer?
Yes: 1991–2020 averaged 1.9° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 84% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Dublin.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.