US Geography / US Weather / New York Weather / Riverhead |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 37 | 38 | 47 | 58 | 68 | 78 | 82 | 81 | 74 | 64 | 54 | 42 |
| Avg. Low | 24 | 24 | 31 | 38 | 48 | 58 | 64 | 64 | 56 | 46 | 38 | 28 |
| Mean | 30 | 32 | 40 | 48 | 58 | 68 | 74 | 74 | 66 | 56 | 46 | 36 |
| Avg. Precip. | 4.0 in | 3.6 in | 3.9 in | 4.1 in | 3.8 in | 3.7 in | 3.4 in | 3.8 in | 3.3 in | 3.5 in | 4.3 in | 4.1 in |
Degrees in Fahrenheit
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