Template:Hartford–Springfield weatherbox
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Record high °F (°C) | 72 (22) |
77 (25) |
89 (32) |
96 (36) |
99 (37) |
100 (38) |
103 (39) |
102 (39) |
101 (38) |
91 (33) |
84 (29) |
76 (24) |
103 (39) |
| Mean maximum °F (°C) | 57.0 (13.9) |
57.7 (14.3) |
68.2 (20.1) |
82.3 (27.9) |
90.4 (32.4) |
93.2 (34.0) |
95.9 (35.5) |
94.2 (34.6) |
89.6 (32.0) |
80.2 (26.8) |
70.6 (21.4) |
60.1 (15.6) |
97.7 (36.5) |
| Mean daily maximum °F (°C) | 35.8 (2.1) |
38.5 (3.6) |
47.3 (8.5) |
60.5 (15.8) |
71.7 (22.1) |
79.9 (26.6) |
85.2 (29.6) |
83.3 (28.5) |
75.7 (24.3) |
63.5 (17.5) |
51.5 (10.8) |
40.6 (4.8) |
61.1 (16.2) |
| Daily mean °F (°C) | 27.1 (−2.7) |
29.6 (−1.3) |
37.8 (3.2) |
49.5 (9.7) |
60.0 (15.6) |
68.9 (20.5) |
74.3 (23.5) |
72.5 (22.5) |
64.8 (18.2) |
53.0 (11.7) |
42.3 (5.7) |
32.6 (0.3) |
51.0 (10.6) |
| Mean daily minimum °F (°C) | 18.8 (−7.3) |
20.7 (−6.3) |
28.2 (−2.1) |
38.4 (3.6) |
48.4 (9.1) |
57.8 (14.3) |
63.4 (17.4) |
61.7 (16.5) |
53.8 (12.1) |
42.4 (5.8) |
33.0 (0.6) |
24.6 (−4.1) |
40.9 (4.9) |
| Mean minimum °F (°C) | −0.9 (−18.3) |
1.9 (−16.7) |
11.4 (−11.4) |
26.3 (−3.2) |
34.7 (1.5) |
44.9 (7.2) |
53.0 (11.7) |
50.1 (10.1) |
38.5 (3.6) |
27.7 (−2.4) |
17.7 (−7.9) |
7.7 (−13.5) |
−3.4 (−19.7) |
| Record low °F (°C) | −26 (−32) |
−24 (−31) |
−6 (−21) |
9 (−13) |
28 (−2) |
37 (3) |
44 (7) |
36 (2) |
30 (−1) |
17 (−8) |
1 (−17) |
−18 (−28) |
−26 (−32) |
| Average precipitation inches (mm) | 3.28 (83) |
3.13 (80) |
3.81 (97) |
3.88 (99) |
3.79 (96) |
4.28 (109) |
4.17 (106) |
4.21 (107) |
4.39 (112) |
4.52 (115) |
3.51 (89) |
4.08 (104) |
47.05 (1,195) |
| Average snowfall inches (cm) | 14.2 (36) |
14.8 (38) |
9.4 (24) |
1.1 (2.8) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.7 (1.8) |
1.4 (3.6) |
10.1 (26) |
51.7 (131) |
| Average precipitation days (≥ 0.01 in) | 10.9 | 10.5 | 11.2 | 11.5 | 12.3 | 11.8 | 10.7 | 10.4 | 9.2 | 10.5 | 9.9 | 11.5 | 130.4 |
| Average snowy days (≥ 0.1 in) | 6.1 | 6.2 | 3.8 | 0.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.9 | 4.5 | 22.3 |
| Average relative humidity (%) | 63.9 | 63.0 | 60.4 | 58.0 | 63.0 | 67.3 | 68.0 | 70.6 | 72.9 | 69.2 | 68.3 | 68.0 | 66.1 |
| Average dew point °F (°C) | 13.6 (−10.2) |
15.8 (−9.0) |
23.4 (−4.8) |
32.4 (0.2) |
45.0 (7.2) |
55.6 (13.1) |
61.0 (16.1) |
60.1 (15.6) |
53.1 (11.7) |
40.8 (4.9) |
31.3 (−0.4) |
19.8 (−6.8) |
37.7 (3.1) |
| Mean monthly sunshine hours | 169.8 | 176.1 | 213.9 | 228.2 | 258.6 | 273.4 | 293.1 | 269.6 | 223.6 | 199.4 | 139.4 | 139.5 | 2,584.6 |
| Percent possible sunshine | 58 | 59 | 58 | 57 | 57 | 60 | 64 | 63 | 60 | 58 | 47 | 49 | 58 |
| Average ultraviolet index | 1 | 2 | 4 | 6 | 7 | 8 | 8 | 8 | 6 | 4 | 2 | 1 | 5 |
| Source 1: NOAA (relative humidity, dew point, and sun 1961–1990)[2][3][4] | |||||||||||||
| Source 2: Weather Atlas (UV)[5] | |||||||||||||
- ^ Mean monthly maxima and minima (i.e. the expected highest and lowest temperature readings at any point during the year or given month) calculated based on data at said location from 1991 to 2020.
- ^ Official records for Hartford kept at downtown from January 1905 to December 1948, Brainard Airport from January 1949 to December 1954, and at Bradley Int'l in Windsor Locks since January 1955.[1]
- ^ ThreadEx
- ^ "NowData – NOAA Online Weather Data". National Oceanic and Atmospheric Administration. Retrieved May 30, 2021.
- ^ "Station: Hartford Bradley INTP AP, CT". U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991–2020). National Oceanic and Atmospheric Administration. Retrieved May 30, 2021.
- ^ "WMO Climate Normals for HARTFORD/BRADLEY INT'L ARPT CT 1961–1990". National Oceanic and Atmospheric Administration. Retrieved September 17, 2020.
- ^ "Springfield, Massachusetts, USA - Monthly weather forecast and Climate data". Weather Atlas. Retrieved July 4, 2019.