Darien weather in March
In March, Darien sees average daytime highs of 46°F and overnight lows near 34°F, with 4.1 in of precipitation across 10.3 wet days and about 11.7 hours of daylight. It is the 9th-warmest and 1st-wettest month of the year here.
Highs climb over the month, from about 42°F in the first days to 50°F by the end. The sky is clear or mostly clear about 27% of the time in March, and the air most often feels dry.
Daylight stretches from about 11 hours at the start of March to 12 h 24 min by month's end. Set against the rest of the year, March is Darien's 10th-clearest and 1st-windiest month. For the whole year in context, see Darien's year-round climate.
- Daytime high
- 46°
- 9th warmest
- Overnight low
- 34°
- 4th coldest
- Precipitation
- 4.1 in
- 10.3 wet days
- Daylight
- 11 h 42 min
- 6:14 AM – 5:53 PM
- Cloud cover
- 62%
- 10th clearest
- Wind
- 9 mph
- 1st windiest
- Solar energy
- 4.07 kWh/m²
- Travel score
- 1.2
- out of 10
Darien is town in Fairfield County, Connecticut, United States.
- Founded
- 1820
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in March
Highs climb over the month, from about 42°F in the first days to 50°F by the end.
A typical March day in Darien reaches about 46°F in the afternoon and slips back to 34°F overnight — a 12°F spread between the day's warmth and the night's chill. On most days the high lands between 36°F and 57°F. Set against its neighbours, March runs about 7°F warmer than February and about 11°F cooler than April.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 42 | 42 | 42 | 43 | 43 | 43 | 43 | 44 | 44 | 44 | 44 | 44 | 45 | 45 | 45 | 46 | 46 | 46 | 46 | 47 | 47 | 47 | 48 | 48 | 48 | 49 | 49 | 50 | 50 | 50 | 51 |
| Avg low (°F) | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 31 | 32 | 32 | 32 | 32 | 33 | 33 | 33 | 33 | 34 | 34 | 34 | 35 | 35 | 35 | 36 | 36 | 37 | 37 | 37 | 38 | 38 | 38 | 39 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 42 | 30 |
| 2 | 42 | 30 |
| 3 | 42 | 30 |
| 4 | 43 | 30 |
| 5 | 43 | 31 |
| 6 | 43 | 31 |
| 7 | 43 | 31 |
| 8 | 44 | 31 |
| 9 | 44 | 32 |
| 10 | 44 | 32 |
| 11 | 44 | 32 |
| 12 | 44 | 32 |
| 13 | 45 | 33 |
| 14 | 45 | 33 |
| 15 | 45 | 33 |
| 16 | 46 | 33 |
| 17 | 46 | 34 |
| 18 | 46 | 34 |
| 19 | 46 | 34 |
| 20 | 47 | 35 |
| 21 | 47 | 35 |
| 22 | 47 | 35 |
| 23 | 48 | 36 |
| 24 | 48 | 36 |
| 25 | 48 | 37 |
| 26 | 49 | 37 |
| 27 | 49 | 37 |
| 28 | 50 | 38 |
| 29 | 50 | 38 |
| 30 | 50 | 38 |
| 31 | 51 | 39 |
How March really feels in Darien
Once humidity and wind are folded in, March averages 0 days that feel above 90°F and 29 that feel at or below 32°F — the comfort signal a plain temperature reading hides.
The story in March is cold — wind chill drags the overnight "feels like" below the raw low.
Darien weather by month
How March compares with the rest of the year at a glance. March is the 9th-warmest and 1st-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 37° / 26° | 3.3 | 9 | 4.6 | 9.4 | 0.0 |
| Feb | 39° / 27° | 3.1 | 8.6 | 4 | 10.4 | 0.0 |
| Mar | 46° / 34° | 4.1 | 10.3 | 3.4 | 11.7 | 1.2 |
| Apr | 57° / 44° | 3.6 | 10.5 | 0.4 | 13.1 | 3.9 |
| May | 67° / 54° | 3.4 | 10.9 | 0 | 14.3 | 5.9 |
| Jun | 76° / 64° | 3.7 | 10.8 | 0 | 14.9 | 6.6 |
| Jul | 82° / 70° | 3.6 | 10.8 | 0 | 14.7 | 6.3 |
| Aug | 80° / 69° | 4.1 | 10.5 | 0 | 13.6 | 6.5 |
| Sep | 73° / 62° | 3.7 | 9 | 0 | 12.3 | 7.0 |
| Oct | 62° / 51° | 4.0 | 8.5 | 0 | 10.9 | 5.6 |
| Nov | 52° / 41° | 3.2 | 8.5 | 0.4 | 9.7 | 2.9 |
| Dec | 43° / 33° | 4.1 | 9.8 | 2.7 | 9.1 | 0.5 |
Cloud cover in March
The sky is clear or mostly clear about 27% of the time in March.
Beyond those clear spells, partly cloudy skies cover about 17% of March, with mostly cloudy or overcast conditions the remaining 56%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 44 | 44 | 44 | 44 | 45 | 45 | 44 | 45 | 46 | 45 | 45 | 46 | 46 | 46 | 46 | 45 | 45 | 45 | 44 | 44 | 44 | 44 | 44 | 43 | 43 | 43 | 43 | 42 | 42 | 42 | 42 |
| Cloudier (%) | 56 | 56 | 56 | 56 | 55 | 55 | 56 | 55 | 54 | 55 | 55 | 54 | 54 | 54 | 54 | 55 | 55 | 55 | 56 | 56 | 56 | 56 | 56 | 57 | 57 | 57 | 57 | 58 | 58 | 58 | 58 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 44 | 56 |
| 2 | 44 | 56 |
| 3 | 44 | 56 |
| 4 | 44 | 56 |
| 5 | 45 | 55 |
| 6 | 45 | 55 |
| 7 | 44 | 56 |
| 8 | 45 | 55 |
| 9 | 46 | 54 |
| 10 | 45 | 55 |
| 11 | 45 | 55 |
| 12 | 46 | 54 |
| 13 | 46 | 54 |
| 14 | 46 | 54 |
| 15 | 46 | 54 |
| 16 | 45 | 55 |
| 17 | 45 | 55 |
| 18 | 45 | 55 |
| 19 | 44 | 56 |
| 20 | 44 | 56 |
| 21 | 44 | 56 |
| 22 | 44 | 56 |
| 23 | 44 | 56 |
| 24 | 43 | 57 |
| 25 | 43 | 57 |
| 26 | 43 | 57 |
| 27 | 43 | 57 |
| 28 | 42 | 58 |
| 29 | 42 | 58 |
| 30 | 42 | 58 |
| 31 | 42 | 58 |
Chance of precipitation in March
Darien gets around 4.1 in of rain and snow over 10.3 wet days in March, the wettest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 33% and peaks near 35% on the wettest days, and about 3 days bring snow.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 34 | 34 | 34 | 34 | 34 | 34 | 33 | 33 | 32 | 32 | 32 | 32 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 32 | 32 | 32 | 33 | 33 | 34 | 34 | 35 | 35 | 35 | 35 | 35 |
| Snow chance (%) | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 9 | 9 | 8 | 8 | 7 | 7 | 6 | 5 | 5 | 5 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 34 | 14 |
| 2 | 34 | 14 |
| 3 | 34 | 14 |
| 4 | 34 | 14 |
| 5 | 34 | 13 |
| 6 | 34 | 13 |
| 7 | 33 | 13 |
| 8 | 33 | 13 |
| 9 | 32 | 12 |
| 10 | 32 | 12 |
| 11 | 32 | 12 |
| 12 | 32 | 12 |
| 13 | 31 | 11 |
| 14 | 31 | 11 |
| 15 | 31 | 11 |
| 16 | 31 | 11 |
| 17 | 31 | 11 |
| 18 | 31 | 10 |
| 19 | 31 | 10 |
| 20 | 32 | 10 |
| 21 | 32 | 10 |
| 22 | 32 | 9 |
| 23 | 33 | 9 |
| 24 | 33 | 8 |
| 25 | 34 | 8 |
| 26 | 34 | 7 |
| 27 | 35 | 7 |
| 28 | 35 | 6 |
| 29 | 35 | 5 |
| 30 | 35 | 5 |
| 31 | 35 | 5 |
Humidity in March
Most of March feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, March lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 99 |
| Comfortable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Dry (%) | Comfortable (%) | |
|---|---|---|
| 1 | 100 | 0 |
| 2 | 100 | 0 |
| 3 | 100 | 0 |
| 4 | 100 | 0 |
| 5 | 100 | 0 |
| 6 | 100 | 0 |
| 7 | 100 | 0 |
| 8 | 100 | 0 |
| 9 | 100 | 0 |
| 10 | 100 | 0 |
| 11 | 100 | 0 |
| 12 | 100 | 0 |
| 13 | 100 | 0 |
| 14 | 100 | 0 |
| 15 | 100 | 0 |
| 16 | 100 | 0 |
| 17 | 100 | 0 |
| 18 | 100 | 0 |
| 19 | 100 | 0 |
| 20 | 100 | 0 |
| 21 | 100 | 0 |
| 22 | 100 | 0 |
| 23 | 100 | 0 |
| 24 | 100 | 0 |
| 25 | 100 | 0 |
| 26 | 100 | 0 |
| 27 | 100 | 0 |
| 28 | 100 | 0 |
| 29 | 100 | 0 |
| 30 | 100 | 0 |
| 31 | 99 | 1 |
Wind in March
Winds average 9 mph in March, the windiest month of the year.
Across March, daily wind ranges from about 8 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 9 | light breeze |
| 2 | 9 | light breeze |
| 3 | 9 | light breeze |
| 4 | 9 | light breeze |
| 5 | 9 | light breeze |
| 6 | 9 | light breeze |
| 7 | 9 | light breeze |
| 8 | 9 | light breeze |
| 9 | 9 | light breeze |
| 10 | 9 | light breeze |
| 11 | 9 | light breeze |
| 12 | 9 | light breeze |
| 13 | 9 | light breeze |
| 14 | 9 | light breeze |
| 15 | 9 | light breeze |
| 16 | 9 | light breeze |
| 17 | 9 | light breeze |
| 18 | 9 | light breeze |
| 19 | 9 | light breeze |
| 20 | 8 | light breeze |
| 21 | 8 | light breeze |
| 22 | 8 | light breeze |
| 23 | 8 | light breeze |
| 24 | 8 | light breeze |
| 25 | 8 | light breeze |
| 26 | 8 | light breeze |
| 27 | 8 | light breeze |
| 28 | 8 | light breeze |
| 29 | 8 | light breeze |
| 30 | 8 | light breeze |
| 31 | 8 | light breeze |
Sunrise & sunset in March
Daylight runs from about 11 hours at the start of March to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 84 minutes over March. Sunrise moves from 6:38 AM to 5:48 AM, and sunset from 5:36 PM to 6:10 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.0 | 11.0 | 11.1 | 11.1 | 11.2 | 11.2 | 11.2 | 11.3 | 11.3 | 11.4 | 11.4 | 11.5 | 11.5 | 11.6 | 11.6 | 11.7 | 11.7 | 11.8 | 11.8 | 11.8 | 11.9 | 11.9 | 12.0 | 12.0 | 12.1 | 12.1 | 12.2 | 12.2 | 12.3 | 12.3 | 12.4 |
| Sunrise (AM) | 6:38 | 6:36 | 6:35 | 6:33 | 6:32 | 6:30 | 6:29 | 6:27 | 6:25 | 6:24 | 6:22 | 6:20 | 6:19 | 6:17 | 6:15 | 6:14 | 6:12 | 6:10 | 6:09 | 6:07 | 6:05 | 6:03 | 6:02 | 6:00 | 5:58 | 5:57 | 5:55 | 5:53 | 5:51 | 5:50 | 5:48 |
| Sunset (PM) | 5:36 | 5:37 | 5:39 | 5:40 | 5:41 | 5:42 | 5:43 | 5:44 | 5:45 | 5:47 | 5:48 | 5:49 | 5:50 | 5:51 | 5:52 | 5:53 | 5:54 | 5:56 | 5:57 | 5:58 | 5:59 | 6:00 | 6:01 | 6:02 | 6:03 | 6:04 | 6:05 | 6:06 | 6:08 | 6:09 | 6:10 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.0 | 6:38 | 5:36 |
| 2 | 11.0 | 6:36 | 5:37 |
| 3 | 11.1 | 6:35 | 5:39 |
| 4 | 11.1 | 6:33 | 5:40 |
| 5 | 11.2 | 6:32 | 5:41 |
| 6 | 11.2 | 6:30 | 5:42 |
| 7 | 11.2 | 6:29 | 5:43 |
| 8 | 11.3 | 6:27 | 5:44 |
| 9 | 11.3 | 6:25 | 5:45 |
| 10 | 11.4 | 6:24 | 5:47 |
| 11 | 11.4 | 6:22 | 5:48 |
| 12 | 11.5 | 6:20 | 5:49 |
| 13 | 11.5 | 6:19 | 5:50 |
| 14 | 11.6 | 6:17 | 5:51 |
| 15 | 11.6 | 6:15 | 5:52 |
| 16 | 11.7 | 6:14 | 5:53 |
| 17 | 11.7 | 6:12 | 5:54 |
| 18 | 11.8 | 6:10 | 5:56 |
| 19 | 11.8 | 6:09 | 5:57 |
| 20 | 11.8 | 6:07 | 5:58 |
| 21 | 11.9 | 6:05 | 5:59 |
| 22 | 11.9 | 6:03 | 6:00 |
| 23 | 12.0 | 6:02 | 6:01 |
| 24 | 12.0 | 6:00 | 6:02 |
| 25 | 12.1 | 5:58 | 6:03 |
| 26 | 12.1 | 5:57 | 6:04 |
| 27 | 12.2 | 5:55 | 6:05 |
| 28 | 12.2 | 5:53 | 6:06 |
| 29 | 12.3 | 5:51 | 6:08 |
| 30 | 12.3 | 5:50 | 6:09 |
| 31 | 12.4 | 5:48 | 6:10 |
Solar energy in March
Average shortwave solar energy reaching the ground each day in March, about 4.07 kWh/m².
For context, solar energy here swings from a low near 1.73 kWh/m² to a high of 6.1 kWh/m² in June across the year — March's 4.07 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 3.5 | 3.6 | 3.6 | 3.7 | 3.7 | 3.8 | 3.8 | 3.8 | 3.9 | 3.9 | 4.0 | 4.0 | 4.0 | 4.1 | 4.1 | 4.1 | 4.2 | 4.2 | 4.2 | 4.2 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.4 | 4.4 | 4.4 | 4.4 | 4.5 | 4.5 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 3.5 | Moderate |
| 2 | 3.6 | Moderate |
| 3 | 3.6 | Moderate |
| 4 | 3.7 | Moderate |
| 5 | 3.7 | Moderate |
| 6 | 3.8 | Moderate |
| 7 | 3.8 | Moderate |
| 8 | 3.8 | Moderate |
| 9 | 3.9 | Moderate |
| 10 | 3.9 | Moderate |
| 11 | 4.0 | Moderate |
| 12 | 4.0 | Bright |
| 13 | 4.0 | Bright |
| 14 | 4.1 | Bright |
| 15 | 4.1 | Bright |
| 16 | 4.1 | Bright |
| 17 | 4.2 | Bright |
| 18 | 4.2 | Bright |
| 19 | 4.2 | Bright |
| 20 | 4.2 | Bright |
| 21 | 4.3 | Bright |
| 22 | 4.3 | Bright |
| 23 | 4.3 | Bright |
| 24 | 4.3 | Bright |
| 25 | 4.3 | Bright |
| 26 | 4.4 | Bright |
| 27 | 4.4 | Bright |
| 28 | 4.4 | Bright |
| 29 | 4.4 | Bright |
| 30 | 4.5 | Bright |
| 31 | 4.5 | Bright |
Hazard calendar for Darien
None of Darien's seasonal hazards are active in March. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Darien sits in the Atlantic hurricane belt; the season peaks August–October.
Is March a good time to visit Darien?
Our two travel scores rate March for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
March is a weaker month for outdoor sightseeing in Darien.
What to pack for Darien in March
From March's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In March, Darien sees daytime highs around 46°F and nights near 34°F. Pack a warm layer. Worth having: a heavy coat and rain gear. About 10 days see rain.
Sea temperature near Darien in March
The nearest coast averages about 37°F in March — 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 74°F and coldest in February near 35°F.
It's comfortable for a long swim from Jun 30 to Sep 30 — about 3.1 months when the water holds above 68°F.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 39 | 35 | 37 | 44 | 55 | 65 | 72 | 74 | 71 | 64 | 55 | 46 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Refreshing | Refreshing | Cool | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 39 | Bracing |
| Feb | 35 | Bracing |
| Mar | 37 | Bracing |
| Apr | 44 | Bracing |
| May | 55 | Bracing |
| Jun | 65 | Cool |
| Jul | 72 | Refreshing |
| Aug | 74 | Refreshing |
| Sep | 71 | Refreshing |
| Oct | 64 | Cool |
| Nov | 55 | Bracing |
| Dec | 46 | Bracing |
UV index in Darien in March
Clear-sky midday UV in March peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Darien peaks around July 11 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 23 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) | 2 | 3 | 5 | 6 | 7 | 8 | 8 | 6 | 6 | 3 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | Very high | Very high | Very high | High | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 5 | Moderate |
| Apr | 6 | High |
| May | 7 | Very high |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 6 | High |
| Sep | 6 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Moderate |
| Dec | 1 | Low |
Air quality in Darien in March
Average fine-particle pollution (PM2.5) through the year — so you can see where March falls, not just the annual average.
Air quality in Darien is worst in July — around 20 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (November, 11 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) | 13 | 16 | 17 | 17 | 18 | 19 | 20 | 17 | 16 | 13 | 11 | 13 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 16 | Moderate |
| Mar | 17 | Moderate |
| Apr | 17 | Moderate |
| May | 18 | Moderate |
| Jun | 19 | Moderate |
| Jul | 20 | Moderate |
| Aug | 17 | Moderate |
| Sep | 16 | Moderate |
| Oct | 13 | Moderate |
| Nov | 11 | Good |
| Dec | 13 | Moderate |
Where is Darien?
Darien sits at 41.1°N, 73.5°W, 46 ft above sea level, in United States. The nearest listed city is Stamford, 3.7 mi away.
Topography around Darien
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Darien.
Within 2 miles, the terrain around Darien has only modest variations in elevation — a maximum elevation change of 289 ft around an average of 92 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 692 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,909 ft.
The land around Darien is covered by trees (74%) within 2 miles, trees (48%) and water (43%) within 10 miles, and trees (54%) and water (31%) 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 Darien (41.0787°, -73.4693°, elevation 46 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).