Weather and climate in Stock Island, FL
What the weather is like in Stock Island
The warmest month in Stock Island is August, with average highs of 86°F. The coolest is January, when nights average 70°F. About 41.5 in of rain and snow falls in a typical year, most in September and least in March.
Skies are clearest in April (37% average cloud cover) and cloudiest in September (62%). Combining cloud with the length of truly dark nights, February, March, November offer the most clear, dark hours for stargazing.
Clear, dark hours per night
Hours of full astronomical darkness in mid-month, multiplied by the average share of clear sky. A rough guide to how much good observing time a typical night offers.
Monthly averages
| Month | High | Low | Precipitation | Cloud cover | Humidity | Wind | Dark hours |
|---|---|---|---|---|---|---|---|
| January | 73°F | 70°F | 1.3 in | 51% | 78% | 12 mph | 10.6 h |
| February | 74°F | 71°F | 1.3 in | 42% | 80% | 11 mph | 10.1 h |
| March | 75°F | 73°F | 1.0 in | 39% | 77% | 11 mph | 9.5 h |
| April | 78°F | 76°F | 1.7 in | 37% | 76% | 11 mph | 8.6 h |
| May | 81°F | 79°F | 3.8 in | 43% | 76% | 10 mph | 7.8 h |
| June | 84°F | 82°F | 6.2 in | 62% | 78% | 9 mph | 7.4 h |
| July | 85°F | 84°F | 5.0 in | 59% | 75% | 8 mph | 7.6 h |
| August | 86°F | 84°F | 6.1 in | 58% | 75% | 9 mph | 8.3 h |
| September | 85°F | 83°F | 7.0 in | 62% | 77% | 9 mph | 9.2 h |
| October | 83°F | 81°F | 4.6 in | 53% | 77% | 12 mph | 9.9 h |
| November | 78°F | 76°F | 1.9 in | 47% | 76% | 12 mph | 10.4 h |
| December | 76°F | 73°F | 1.5 in | 49% | 79% | 12 mph | 10.7 h |
Climate nearby
Climate averages: NASA POWER, 2001–2025, for the grid area around 24.50, -81.88 (about 50 km across). High and low temperatures are estimated from the monthly mean and the average daily range. Hills, coasts and cities can differ from the area average. Sources and methods.