Ontonagon Marina Boat Launch Air Temperatures
Jan
| High: | 21 F° | (-6.2 C°) |
| Low: | -1 F° | (-18.1 C°) |
Feb
| High: | 26 F° | (-3.5 C°) |
| Low: | 2 F° | (-16.8 C°) |
March
| High: | 36 F° | (2.4 C°) |
| Low: | 14 F° | (-10.1 C°) |
April
| High: | 50 F° | (10.2 C°) |
| Low: | 28 F° | (-2.4 C°) |
May
| High: | 63 F° | (17.3 C°) |
| Low: | 38 F° | (3.4 C°) |
June
| High: | 72 F° | (22.4 C°) |
| Low: | 48 F° | (8.8 C°) |
July
| High: | 78 F° | (25.3 C°) |
| Low: | 53 F° | (11.6 C°) |
August
| High: | 76 F° | (24.2 C°) |
| Low: | 52 F° | (10.9 C°) |
Sept
| High: | 67 F° | (19.4 C°) |
| Low: | 44 F° | (6.4 C°) |
Oct
| High: | 53 F° | (11.8 C°) |
| Low: | 32 F° | (0 C°) |
Nov
| High: | 38 F° | (3.2 C°) |
| Low: | 21 F° | (-6.1 C°) |
Dec
| High: | 25 F° | (-3.8 C°) |
| Low: | 7 F° | (-13.9 C°) |