Weather StoryAlmanac, microseasons, and the day's weather story.

Weather in Northwest Harwinton, Connecticut

Roses open along the stoops. Day 59 of spring. Read this microseason across nine climate regions →

Northwest Harwinton, CT
Sunday, May 17 at 4:07 AM
63
°
Partly Cloudy
Feels like
61°
Humidity
61%
Wind
4 mph
Sunrise
5:30 AM
Sunset
8:07 PM
Northwest Harwinton, CT
Hour by hour · 24h
48°
12a
47°
1a
47°
2a
48°
3a
46°
4a
46°
5a
45°
6a
47°
7a
50°
8a
51°
9a
54°
10a
55°
11a
56°
12p
57°
1p
59°
2p
60°
3p
61°
4p
58°
5p
58°
11%
6p
56°
7p
54°
8p
52°
9p
50°
10p
49°
11p
L 45°H 61°
Northwest Harwinton, CT
7-day forecast
  1. Today
    May 17
    Overcast
    13%
    84°58°
  2. Monday
    May 18
    Overcast
    80°58°
  3. Tuesday
    May 19
    Overcast
    16%
    89°57°
  4. Wednesday
    May 20
    Showers
    81%
    87°51°
  5. Thursday
    May 21
    Overcast
    14%
    67°45°
  6. Friday
    May 22
    Overcast
    13%
    60°43°
  7. Saturday
    May 23
    Drizzle
    20%
    48°44°
Northwest Harwinton, CT
Anemometer · 24h winds · from true
NESW
From · True
SSW
193° · veering 13°
Direction
SSW
193°
Sustained
4
mph
Gust
10
mph
Peak 24h
26
avg 7
Beaufort · 2 · LIGHT BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 7 · pk 26 @ 8:00p
−24h−18h−12h−6hnow
Light breeze veering 13° from the ssw.
Northwest Harwinton, CT
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
976.7
-0.9 mb in 3h · rising · 28.84 inHg
Now
976.7
mb
3h
-0.9
mb
12h
-1.9
mb
24h
-4.2
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 977983
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Northwest Harwinton, CT
Air quality
62
AQI
Moderate
PM 2.5
11.1 μg/m³
PM 10
13.4 μg/m³
NO₂
13.8 μg/m³
Ozone
90.0 μg/m³
UV Index
0.0 Low
Northwest Harwinton, CT
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
9:01 AM
Sunrise
5:30 AM
Daylight
14h 37m
Sunset
8:07 PM
Civil dusk
12:39 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Northwest Harwinton, CT
The moon
New Moon
0% illuminated
Moonrise
9:33 AM
Moonset
12:34 AM
In sign
♊︎ Gemini
Northwest Harwinton, CT
Microseason · 28 of 72
May 16–20

Roses open along the stoops

plant
Jan 137% of the yearDec 31

Read this microseason across nine climate regions →

Northwest Harwinton at a glance

  • Today vs. normal: 7°F below the seasonal normal for this latitude
  • Last frost: April 27 (climatological average for this latitude)
  • Microseason: 28 of 72, May 16–20
  • Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.

Right now in the garden

Warm-season window is open

As of May 17, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.

ZIP codes in Northwest Harwinton

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.