| Climate data for Indianapolis (Indianapolis International Airport), 1991–2020 normals,[a] extremes 1871–present[b] | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °F (°C) | 71 (22) |
77 (25) |
85 (29) |
90 (32) |
96 (36) |
104 (40) |
106 (41) |
103 (39) |
100 (38) |
92 (33) |
81 (27) |
74 (23) |
106 (41) |
| Mean maximum °F (°C) | 58.8 (14.9) |
64.4 (18.0) |
74.0 (23.3) |
80.8 (27.1) |
87.1 (30.6) |
91.9 (33.3) |
93.4 (34.1) |
92.6 (33.7) |
90.7 (32.6) |
82.8 (28.2) |
70.5 (21.4) |
61.7 (16.5) |
94.9 (34.9) |
| Mean daily maximum °F (°C) | 36.1 (2.3) |
40.8 (4.9) |
51.9 (11.1) |
63.9 (17.7) |
73.4 (23.0) |
82.0 (27.8) |
85.2 (29.6) |
84.3 (29.1) |
78.2 (25.7) |
65.6 (18.7) |
51.8 (11.0) |
40.4 (4.7) |
62.8 (17.1) |
| Daily mean °F (°C) | 28.5 (−1.9) |
32.5 (0.3) |
42.4 (5.8) |
53.6 (12.0) |
63.6 (17.6) |
72.5 (22.5) |
75.8 (24.3) |
74.7 (23.7) |
67.8 (19.9) |
55.5 (13.1) |
43.3 (6.3) |
33.3 (0.7) |
53.6 (12.0) |
| Mean daily minimum °F (°C) | 20.9 (−6.2) |
24.2 (−4.3) |
33.0 (0.6) |
43.3 (6.3) |
53.7 (12.1) |
62.9 (17.2) |
66.4 (19.1) |
65.0 (18.3) |
57.4 (14.1) |
45.5 (7.5) |
34.9 (1.6) |
26.2 (−3.2) |
44.4 (6.9) |
| Mean minimum °F (°C) | −2.1 (−18.9) |
4.8 (−15.1) |
14.9 (−9.5) |
27.2 (−2.7) |
37.8 (3.2) |
49.2 (9.6) |
56.1 (13.4) |
55.1 (12.8) |
43.1 (6.2) |
30.2 (−1.0) |
19.6 (−6.9) |
6.8 (−14.0) |
−4.9 (−20.5) |
| Record low °F (°C) | −27 (−33) |
−21 (−29) |
−7 (−22) |
18 (−8) |
27 (−3) |
37 (3) |
46 (8) |
41 (5) |
30 (−1) |
20 (−7) |
−5 (−21) |
−23 (−31) |
−27 (−33) |
| Average precipitation inches (mm) | 3.12 (79) |
2.43 (62) |
3.69 (94) |
4.34 (110) |
4.75 (121) |
4.95 (126) |
4.42 (112) |
3.20 (81) |
3.14 (80) |
3.22 (82) |
3.45 (88) |
2.92 (74) |
43.63 (1,108) |
| Average snowfall inches (cm) | 8.8 (22) |
6.0 (15) |
3.2 (8.1) |
0.2 (0.51) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.1 (0.25) |
0.8 (2.0) |
6.4 (16) |
25.5 (65) |
| Average precipitation days (≥ 0.01 in) | 12.3 | 10.3 | 11.5 | 11.9 | 13.3 | 11.5 | 10.3 | 8.3 | 7.9 | 8.9 | 10.2 | 11.8 | 128.2 |
| Average snowy days (≥ 0.1 in) | 7.0 | 5.8 | 2.4 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 1.2 | 5.6 | 22.4 |
| Average relative humidity (%) | 75.0 | 73.6 | 69.9 | 65.6 | 67.1 | 68.4 | 72.8 | 75.4 | 74.4 | 71.6 | 75.5 | 78.0 | 72.3 |
| Average dew point °F (°C) | 18.1 (−7.7) |
21.6 (−5.8) |
30.9 (−0.6) |
39.7 (4.3) |
50.5 (10.3) |
59.9 (15.5) |
64.9 (18.3) |
63.7 (17.6) |
56.7 (13.7) |
44.1 (6.7) |
34.9 (1.6) |
24.4 (−4.2) |
42.4 (5.8) |
| Mean monthly sunshine hours | 132.1 | 145.7 | 178.3 | 214.8 | 264.7 | 287.2 | 295.2 | 273.7 | 232.6 | 196.6 | 117.1 | 102.4 | 2,440.4 |
| Percent possible sunshine | 44 | 49 | 48 | 54 | 59 | 64 | 65 | 64 | 62 | 57 | 39 | 35 | 55 |
| Average ultraviolet index | 2 | 3 | 4 | 6 | 8 | 9 | 9 | 8 | 6 | 4 | 2 | 2 | 5 |
| Source 1: NOAA (relative humidity, dew point, and sun 1961–1990[1][2][3] | |||||||||||||
| Source 2: Weather Atlas (UV)[4] | |||||||||||||
Notes edit
- ^ 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 Indianapolis kept at downtown from February 1871 to December 1942, and at Indianapolis Int'l since January 1943. For more information, see Threadex
References edit
- ^ "NowData – NOAA Online Weather Data". National Oceanic and Atmospheric Administration. Retrieved May 29, 2021.
- ^ "Station: Indianapolis, TN". U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991–2020). National Oceanic and Atmospheric Administration. Retrieved May 29, 2021.
- ^ "WMO Climate Normals for INDIANAPOLIS/INT'L ARPT IN 1961–1990". National Oceanic and Atmospheric Administration. Retrieved July 25, 2020.
- ^ "Indianapolis, Indiana - Detailed climate information and monthly weather forecast". Weather Atlas. Yu Media Group. Retrieved June 27, 2019.