NJ Daily Station Normals (1991-2020)

Trenton-Mercer Airport

Station ID: 288887

Minimum Temperature (°F)

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 MONTH
Jan 25.9 25.7 25.5 25.4 25.2 25.0 24.9 24.8 24.6 24.5 24.4 24.3 24.2 24.1 24.0 24.0 23.9 23.8 23.8 23.8 23.7 23.7 23.7 23.7 23.7 23.7 23.8 23.8 23.8 23.9 24.0 24.3
Feb 24.0 24.1 24.2 24.3 24.4 24.5 24.6 24.7 24.9 25.0 25.2 25.3 25.5 25.6 25.8 26.0 26.2 26.3 26.5 26.7 26.9 27.1 27.3 27.6 27.8 28.0 28.2 28.5 28.6 N/A N/A 25.9
Mar 28.7 28.9 29.2 29.4 29.7 29.9 30.2 30.4 30.7 30.9 31.2 31.5 31.8 32.0 32.3 32.6 32.9 33.2 33.5 33.7 34.0 34.3 34.6 34.9 35.2 35.5 35.9 36.2 36.5 36.8 37.1 32.7
Apr 37.4 37.7 38.1 38.4 38.7 39.0 39.3 39.7 40.0 40.3 40.6 41.0 41.3 41.6 42.0 42.3 42.6 42.9 43.2 43.6 43.9 44.2 44.5 44.9 45.2 45.5 45.8 46.1 46.4 46.7 N/A 42.1
May 47.0 47.4 47.7 48.0 48.3 48.6 48.9 49.2 49.5 49.8 50.1 50.4 50.7 51.0 51.3 51.6 51.9 52.2 52.5 52.8 53.1 53.4 53.7 54.0 54.3 54.6 54.9 55.2 55.6 55.9 56.2 51.6
Jun 56.5 56.8 57.1 57.4 57.8 58.1 58.4 58.7 59.0 59.3 59.6 60.0 60.3 60.6 60.9 61.2 61.5 61.8 62.1 62.3 62.6 62.9 63.2 63.4 63.7 63.9 64.2 64.4 64.6 64.8 N/A 60.9
Jul 65.0 65.2 65.4 65.6 65.8 65.9 66.1 66.2 66.4 66.5 66.6 66.7 66.8 66.9 66.9 67.0 67.0 67.1 67.1 67.1 67.1 67.1 67.1 67.1 67.1 67.1 67.0 67.0 66.9 66.8 66.8 66.6
Aug 66.7 66.6 66.5 66.4 66.3 66.2 66.1 66.0 65.9 65.8 65.7 65.5 65.4 65.3 65.1 65.0 64.8 64.7 64.5 64.3 64.2 64.0 63.8 63.7 63.5 63.3 63.1 62.9 62.7 62.5 62.3 64.8
Sep 62.0 61.8 61.6 61.3 61.1 60.8 60.5 60.3 60.0 59.7 59.4 59.1 58.8 58.5 58.1 57.8 57.5 57.1 56.8 56.4 56.0 55.6 55.3 54.9 54.5 54.1 53.7 53.3 52.9 52.4 N/A 57.7
Oct 52.0 51.6 51.2 50.8 50.3 49.9 49.5 49.1 48.6 48.2 47.8 47.4 47.0 46.5 46.1 45.7 45.3 44.9 44.5 44.2 43.8 43.4 43.0 42.7 42.3 42.0 41.6 41.3 41.0 40.7 40.3 45.9
Nov 40.0 39.7 39.4 39.2 38.9 38.6 38.3 38.1 37.8 37.5 37.3 37.0 36.8 36.6 36.3 36.1 35.8 35.6 35.4 35.2 34.9 34.7 34.5 34.3 34.0 33.8 33.6 33.4 33.2 32.9 N/A 36.3
Dec 32.7 32.5 32.3 32.0 31.8 31.6 31.3 31.1 30.9 30.7 30.4 30.2 30.0 29.7 29.5 29.3 29.0 28.8 28.6 28.3 28.1 27.9 27.7 27.5 27.3 27.0 26.8 26.6 26.4 26.2 26.1 29.3

Maximum Temperature (°F)

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 MONTH
Jan 40.6 40.4 40.3 40.1 40.0 39.9 39.8 39.7 39.6 39.5 39.5 39.4 39.4 39.3 39.3 39.3 39.3 39.3 39.3 39.4 39.4 39.4 39.5 39.6 39.6 39.7 39.8 39.9 40.0 40.1 40.2 39.7
Feb 40.4 40.5 40.6 40.8 40.9 41.1 41.3 41.4 41.6 41.8 42.0 42.2 42.4 42.6 42.8 43.0 43.2 43.4 43.6 43.8 44.1 44.3 44.5 44.8 45.0 45.3 45.5 45.8 45.9 N/A N/A 42.8
Mar 46.0 46.3 46.6 46.8 47.1 47.4 47.7 48.0 48.3 48.6 48.9 49.2 49.5 49.9 50.2 50.5 50.9 51.3 51.6 52.0 52.4 52.8 53.1 53.5 53.9 54.3 54.8 55.2 55.6 56.0 56.4 50.8
Apr 56.9 57.3 57.7 58.2 58.6 59.1 59.5 59.9 60.4 60.8 61.2 61.6 62.1 62.5 62.9 63.3 63.7 64.1 64.5 64.9 65.2 65.6 66.0 66.3 66.7 67.0 67.3 67.6 67.9 68.2 N/A 62.9
May 68.5 68.8 69.1 69.4 69.7 69.9 70.2 70.4 70.7 70.9 71.2 71.4 71.7 71.9 72.1 72.4 72.6 72.9 73.1 73.4 73.6 73.9 74.1 74.4 74.6 74.9 75.2 75.4 75.7 76.0 76.3 72.4
Jun 76.6 76.9 77.2 77.5 77.8 78.1 78.4 78.8 79.1 79.4 79.7 80.0 80.4 80.7 81.0 81.3 81.6 81.9 82.2 82.5 82.8 83.0 83.3 83.6 83.8 84.0 84.3 84.5 84.7 84.9 N/A 81.0
Jul 85.1 85.2 85.4 85.5 85.7 85.8 85.9 86.0 86.1 86.2 86.2 86.3 86.3 86.3 86.3 86.4 86.4 86.3 86.3 86.3 86.3 86.2 86.2 86.1 86.1 86.0 86.0 85.9 85.8 85.7 85.7 86.0
Aug 85.6 85.5 85.4 85.3 85.3 85.2 85.1 85.0 84.9 84.8 84.7 84.6 84.5 84.4 84.3 84.2 84.0 83.9 83.8 83.7 83.5 83.4 83.2 83.1 82.9 82.8 82.6 82.4 82.2 82.0 81.8 84.0
Sep 81.6 81.3 81.1 80.9 80.6 80.3 80.1 79.8 79.5 79.2 78.9 78.5 78.2 77.9 77.5 77.2 76.8 76.5 76.1 75.7 75.3 74.9 74.5 74.2 73.8 73.4 72.9 72.5 72.1 71.7 N/A 77.1
Oct 71.3 70.9 70.5 70.1 69.7 69.3 68.9 68.5 68.1 67.7 67.3 66.9 66.5 66.2 65.8 65.4 65.0 64.7 64.3 63.9 63.6 63.2 62.8 62.5 62.1 61.8 61.4 61.1 60.7 60.3 60.0 65.5
Nov 59.6 59.3 58.9 58.6 58.2 57.9 57.5 57.2 56.8 56.5 56.1 55.8 55.4 55.1 54.7 54.3 54.0 53.6 53.3 52.9 52.5 52.2 51.8 51.5 51.1 50.7 50.4 50.0 49.7 49.3 N/A 54.5
Dec 49.0 48.6 48.3 47.9 47.6 47.3 46.9 46.6 46.3 46.0 45.6 45.3 45.0 44.7 44.4 44.2 43.9 43.6 43.3 43.1 42.8 42.6 42.3 42.1 41.9 41.7 41.5 41.3 41.1 40.9 40.7 44.4

Average Temperature (°F)

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 MONTH
Jan 33.2 33.1 32.9 32.7 32.6 32.5 32.3 32.2 32.1 32.0 31.9 31.9 31.8 31.7 31.7 31.6 31.6 31.6 31.6 31.6 31.6 31.6 31.6 31.6 31.7 31.7 31.8 31.8 31.9 32.0 32.1 32.0
Feb 32.2 32.3 32.4 32.5 32.7 32.8 32.9 33.1 33.2 33.4 33.6 33.7 33.9 34.1 34.3 34.5 34.7 34.9 35.1 35.3 35.5 35.7 35.9 36.2 36.4 36.6 36.9 37.1 37.2 N/A N/A 34.3
Mar 37.4 37.6 37.9 38.1 38.4 38.6 38.9 39.2 39.5 39.8 40.1 40.3 40.6 40.9 41.3 41.6 41.9 42.2 42.5 42.9 43.2 43.5 43.9 44.2 44.6 44.9 45.3 45.7 46.0 46.4 46.8 41.7
Apr 47.2 47.5 47.9 48.3 48.7 49.0 49.4 49.8 50.2 50.6 50.9 51.3 51.7 52.1 52.4 52.8 53.2 53.5 53.9 54.2 54.6 54.9 55.2 55.6 55.9 56.2 56.6 56.9 57.2 57.5 N/A 52.5
May 57.8 58.1 58.4 58.7 59.0 59.2 59.5 59.8 60.1 60.4 60.6 60.9 61.2 61.4 61.7 62.0 62.3 62.5 62.8 63.1 63.3 63.6 63.9 64.2 64.5 64.8 65.1 65.3 65.6 65.9 66.2 62.0
Jun 66.5 66.9 67.2 67.5 67.8 68.1 68.4 68.7 69.1 69.4 69.7 70.0 70.3 70.6 70.9 71.2 71.5 71.8 72.1 72.4 72.7 73.0 73.2 73.5 73.7 74.0 74.2 74.4 74.7 74.9 N/A 71.0
Jul 75.1 75.2 75.4 75.6 75.7 75.9 76.0 76.1 76.2 76.3 76.4 76.5 76.5 76.6 76.6 76.7 76.7 76.7 76.7 76.7 76.7 76.7 76.7 76.6 76.6 76.5 76.5 76.4 76.4 76.3 76.2 76.3
Aug 76.1 76.1 76.0 75.9 75.8 75.7 75.6 75.5 75.4 75.3 75.2 75.1 74.9 74.8 74.7 74.6 74.4 74.3 74.2 74.0 73.9 73.7 73.5 73.4 73.2 73.0 72.8 72.6 72.4 72.2 72.0 74.4
Sep 71.8 71.6 71.3 71.1 70.8 70.6 70.3 70.0 69.7 69.4 69.1 68.8 68.5 68.2 67.8 67.5 67.1 66.8 66.4 66.0 65.7 65.3 64.9 64.5 64.1 63.7 63.3 62.9 62.5 62.1 N/A 67.4
Oct 61.7 61.3 60.8 60.4 60.0 59.6 59.2 58.8 58.4 58.0 57.6 57.2 56.7 56.4 56.0 55.6 55.2 54.8 54.4 54.0 53.7 53.3 52.9 52.6 52.2 51.9 51.5 51.2 50.8 50.5 50.2 55.7
Nov 49.8 49.5 49.2 48.9 48.6 48.2 47.9 47.6 47.3 47.0 46.7 46.4 46.1 45.8 45.5 45.2 44.9 44.6 44.3 44.0 43.7 43.4 43.2 42.9 42.6 42.3 42.0 41.7 41.4 41.1 N/A 45.4
Dec 40.8 40.6 40.3 40.0 39.7 39.4 39.1 38.9 38.6 38.3 38.0 37.8 37.5 37.2 37.0 36.7 36.5 36.2 36.0 35.7 35.5 35.2 35.0 34.8 34.6 34.4 34.1 33.9 33.8 33.6 33.4 36.8

Heating Degree Days (number of degrees the average daily temperature is below 65°F)

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 MONTH
Jan 32 32 32 32 32 32 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 1023
Feb 33 33 33 32 32 32 32 32 32 32 31 31 31 31 31 30 30 30 30 30 30 29 29 29 29 28 28 28 28 N/A N/A 858
Mar 28 27 27 27 27 26 26 26 26 25 25 25 24 24 24 24 23 23 22 22 22 22 21 21 20 20 20 19 19 19 18 722
Apr 18 18 17 17 16 16 16 15 15 15 14 14 14 13 13 13 12 12 12 11 11 11 10 10 10 9 9 9 9 8 N/A 387
May 8 8 8 7 7 7 6 6 6 6 6 5 5 5 5 4 4 4 4 4 4 4 3 3 3 3 3 3 2 2 2 148
Jun 2 2 2 2 2 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N/A 20
Jul 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 0 0
Aug 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 0 2
Sep 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 4 4 4 4 N/A 51
Oct 5 5 5 6 6 6 7 7 7 8 8 8 9 9 9 10 10 10 11 11 12 12 12 13 13 13 14 14 14 14 15 304
Nov 15 16 16 16 16 17 17 17 18 18 18 19 19 19 20 20 20 20 21 21 21 22 22 22 22 23 23 23 24 24 N/A 588
Dec 24 24 25 25 25 26 26 26 26 27 27 27 28 28 28 28 28 29 29 29 30 30 30 30 30 31 31 31 31 31 32 873

Cooling Degree Days (number of degrees the average daily temperature is above 65°F)

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 MONTH
Jan 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 0 0
Feb 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 N/A N/A 0
Mar 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 0 1
Apr 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 N/A 12
May 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 4 55
Jun 4 4 4 4 4 4 5 5 5 5 6 6 6 6 6 7 7 7 7 8 8 8 8 9 9 9 9 10 10 10 N/A 199
Jul 10 10 10 11 11 11 11 11 11 11 11 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 11 11 11 11 350
Aug 11 11 11 11 11 11 11 10 10 10 10 10 10 10 10 10 10 9 9 9 9 9 9 8 8 8 8 8 8 7 7 294
Sep 7 7 7 6 6 6 6 6 5 5 5 5 4 4 4 4 4 4 3 3 3 3 2 2 2 2 2 2 2 2 N/A 123
Oct 2 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 16
Nov 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 N/A 0
Dec 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 0 0

Cumulative monthly precipitation (month-to-date, in inches)

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 MONTH
Jan 0.11 0.21 0.32 0.44 0.55 0.67 0.78 0.88 0.98 1.09 1.19 1.30 1.41 1.52 1.62 1.72 1.83 1.93 2.03 2.13 2.23 2.34 2.45 2.55 2.66 2.76 2.86 2.97 3.07 3.18 3.29 3.29
Feb 0.10 0.20 0.30 0.40 0.49 0.59 0.68 0.77 0.86 0.95 1.04 1.14 1.23 1.32 1.41 1.51 1.61 1.70 1.79 1.89 1.98 2.07 2.16 2.26 2.35 2.44 2.53 2.63 2.63 N/A N/A 2.63
Mar 0.11 0.23 0.34 0.46 0.57 0.69 0.82 0.95 1.08 1.21 1.33 1.45 1.57 1.69 1.83 1.96 2.09 2.23 2.37 2.51 2.64 2.77 2.90 3.03 3.17 3.30 3.44 3.57 3.70 3.84 3.97 3.97
Apr 0.12 0.25 0.37 0.49 0.61 0.72 0.83 0.95 1.08 1.20 1.32 1.45 1.57 1.69 1.80 1.92 2.04 2.16 2.28 2.41 2.53 2.66 2.78 2.90 3.02 3.15 3.27 3.39 3.51 3.63 N/A 3.63
May 0.11 0.22 0.34 0.46 0.58 0.70 0.82 0.94 1.06 1.18 1.30 1.43 1.55 1.68 1.80 1.92 2.04 2.17 2.30 2.43 2.57 2.71 2.85 3.00 3.14 3.29 3.43 3.56 3.70 3.85 3.99 3.99
Jun 0.15 0.30 0.45 0.61 0.76 0.92 1.07 1.22 1.37 1.51 1.66 1.80 1.95 2.10 2.25 2.40 2.54 2.68 2.81 2.94 3.07 3.20 3.33 3.46 3.59 3.72 3.85 3.98 4.11 4.25 N/A 4.25
Jul 0.14 0.27 0.41 0.54 0.66 0.79 0.92 1.05 1.20 1.34 1.49 1.63 1.77 1.91 2.05 2.19 2.34 2.48 2.63 2.77 2.92 3.07 3.22 3.37 3.51 3.66 3.80 3.94 4.08 4.23 4.39 4.39
Aug 0.15 0.31 0.46 0.62 0.77 0.91 1.05 1.20 1.34 1.48 1.61 1.75 1.88 2.02 2.17 2.30 2.43 2.56 2.70 2.83 2.96 3.09 3.22 3.36 3.49 3.62 3.75 3.88 3.99 4.10 4.22 4.22
Sep 0.13 0.27 0.41 0.55 0.68 0.81 0.94 1.07 1.21 1.34 1.47 1.59 1.72 1.86 2.00 2.14 2.29 2.43 2.57 2.72 2.85 2.98 3.11 3.25 3.39 3.52 3.67 3.81 3.95 4.09 N/A 4.09
Oct 0.12 0.25 0.38 0.50 0.62 0.75 0.87 1.00 1.12 1.24 1.37 1.49 1.60 1.73 1.86 1.99 2.11 2.24 2.37 2.49 2.62 2.75 2.88 3.00 3.12 3.23 3.34 3.46 3.57 3.68 3.79 3.79
Nov 0.10 0.21 0.31 0.42 0.52 0.63 0.74 0.84 0.95 1.06 1.16 1.26 1.36 1.45 1.55 1.64 1.75 1.85 1.96 2.06 2.16 2.26 2.37 2.48 2.59 2.70 2.82 2.94 3.06 3.18 N/A 3.18
Dec 0.13 0.26 0.40 0.54 0.67 0.81 0.94 1.08 1.21 1.36 1.49 1.63 1.77 1.90 2.03 2.16 2.29 2.42 2.56 2.69 2.82 2.95 3.09 3.21 3.33 3.45 3.57 3.69 3.81 3.93 4.04 4.04