| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Record high °F (°C) | 66 (19) | 72 (22) | 84 (29) | 91 (33) | 95 (35) | 100 (38) | 100 (38) | 101 (38) | 98 (37) | 86 (30) | 76 (24) | 68 (20) | 101 (38) |
| Mean maximum °F (°C) | 51.7 (10.9) | 50.6 (10.3) | 62.0 (16.7) | 78.0 (25.6) | 86.5 (30.3) | 91.4 (33.0) | 92.2 (33.4) | 90.9 (32.7) | 87.0 (30.6) | 76.0 (24.4) | 66.2 (19.0) | 54.2 (12.3) | 94.4 (34.7) |
| Mean daily maximum °F (°C) | 28.9 (−1.7) | 31.5 (−0.3) | 40.9 (4.9) | 55.3 (12.9) | 69.0 (20.6) | 77.6 (25.3) | 82.4 (28.0) | 80.7 (27.1) | 72.6 (22.6) | 58.9 (14.9) | 46.4 (8.0) | 35.0 (1.7) | 56.6 (13.7) |
| Daily mean °F (°C) | 20.9 (−6.2) | 22.9 (−5.1) | 32.3 (0.2) | 45.6 (7.6) | 58.4 (14.7) | 67.5 (19.7) | 72.4 (22.4) | 70.7 (21.5) | 62.7 (17.1) | 50.3 (10.2) | 39.3 (4.1) | 28.2 (−2.1) | 47.6 (8.7) |
| Mean daily minimum °F (°C) | 12.9 (−10.6) | 14.3 (−9.8) | 23.6 (−4.7) | 35.9 (2.2) | 47.8 (8.8) | 57.3 (14.1) | 62.4 (16.9) | 60.7 (15.9) | 52.9 (11.6) | 41.8 (5.4) | 32.1 (0.1) | 21.3 (−5.9) | 38.6 (3.7) |
| Mean minimum °F (°C) | −12.7 (−24.8) | −7.8 (−22.1) | 0.0 (−17.8) | 21.2 (−6.0) | 32.2 (0.1) | 42.3 (5.7) | 50.4 (10.2) | 47.4 (8.6) | 36.2 (2.3) | 26.3 (−3.2) | 13.7 (−10.2) | −1.6 (−18.7) | −15.3 (−26.3) |
| Record low °F (°C) | −30 (−34) | −30 (−34) | −24 (−31) | 2 (−17) | 24 (−4) | 33 (1) | 39 (4) | 35 (2) | 25 (−4) | 15 (−9) | −3 (−19) | −29 (−34) | −30 (−34) |
| Average precipitation inches (mm) | 2.13 (54) | 1.77 (45) | 2.24 (57) | 3.07 (78) | 3.76 (96) | 4.26 (108) | 4.06 (103) | 3.54 (90) | 3.67 (93) | 3.83 (97) | 2.70 (69) | 2.50 (64) | 37.53 (953) |
| Average snowfall inches (cm) | 21.1 (54) | 19.3 (49) | 17.5 (44) | 4.1 (10) | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) | 0.3 (0.76) | 5.7 (14) | 19.5 (50) | 87.5 (222) |
| Average extreme snow depth inches (cm) | 11 (28) | 12 (30) | 11 (28) | 3 (7.6) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 3 (7.6) | 8 (20) | 12 (30) |
| Average precipitation days (≥ 0.01 in) | 14.7 | 12.1 | 12.7 | 13.2 | 13.6 | 13.6 | 12.8 | 11.7 | 11.0 | 12.9 | 13.7 | 15.2 | 157.2 |
| Average snowy days (≥ 0.1 in) | 14.3 | 12.1 | 8.7 | 2.9 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.4 | 4.6 | 11.6 | 54.7 |
| Mean monthly sunshine hours | 126.9 | 146.8 | 190.7 | 206.2 | 251.4 | 270.1 | 301.9 | 258.2 | 201.0 | 159.2 | 91.1 | 91.6 | 2,295.1 |
| Percent possible sunshine | 44 | 50 | 52 | 51 | 55 | 58 | 64 | 59 | 53 | 47 | 32 | 33 | 51 |
| Average ultraviolet index | 1 | 2 | 3 | 5 | 7 | 8 | 8 | 7 | 5 | 3 | 2 | 1 | 4 |
| Source 1: NOAA (sun 1961–1990)[1][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 Burlington were kept at downtown from December 1883 to 3 June 1943, and at Burlington Int'l since 4 June 1943. For more information, see ThreadEx
- ^ "NowData – NOAA Online Weather Data". National Oceanic and Atmospheric Administration. Retrieved May 17, 2021.
- ^ "Station: BURLINGTON INTL AP, VT". U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991–2020). National Oceanic and Atmospheric Administration. Archived from the original on 2023-09-08. Retrieved May 17, 2021.
- ^ "Burlington Vermont Temperature Extremes" (PDF). National Oceanic and Atmospheric Administration. Archived from the original (PDF) on 2023-09-08. Retrieved June 17, 2021.
- ^ "WMO Climate Normals for BURLINGTON/ETHAN ALLEN AIRPOR,VT 1961–1990". National Oceanic and Atmospheric Administration. Archived from the original on 2023-09-08. Retrieved March 11, 2014.
- ^ "Burlington, Vermont, USA - Monthly weather forecast and Climate data". Weather Atlas. Retrieved July 4, 2019.
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