St. Simons Island, GA weather in May
St. Simons Island is warm and often humid in May, with some rain: highs average 83°F and nights drop to about 68°F. Expect about 7 wet days.
- Normal high
- 83°F
- Normal low
- 68°F
- Wet days
- 7
- 2.3 in total
- Muggy days
- 18
- dew point 65°F+
How May changes from start to finish
| May 1 | May 31 | |
|---|---|---|
| Normal high | 80°F | 86°F |
| Normal low | 64°F | 72°F |
| Chance of a wet day | 21% | 27% |
| Sunrise / sunset | 6:40 am / 8:04 pm | 6:22 am / 8:23 pm |
| Daylight | 13.4 h | 14.0 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical May day
- 6 am69°Fdew point 64°F
- 9 am76°Fdew point 65°F
- Noon80°Fdew point 64°F
- 3 pm80°Fdew point 65°F
- 6 pm77°Fdew point 65°F
- 9 pm74°Fdew point 66°F
NOAA hourly normals (local standard time) from Brunswick Malcolm Mckinnon Airport (1 mi away); average wind 9 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F4 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph18 of 31
- Hot dayshigh 90°F or more3 of 31
- Muggy daysdaily mean dew point 65°F or more18 of 31
- Wet daysat least 0.01 in of rain or melted snow7 of 31
- Notable rainat least 0.10 in4 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per May, counted from daily records for each year 1991-2020.
Rain in May
Normal precipitation is 2.3 in; a dry May brings about 1.3 in and a wet one about 2.9 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How May varies from year to year
- Warmest May, 1991-20202019: average high 87°F
- Coolest May1992: average high 78°F
- Wettest May2012: 7.1 in
- Driest May1996: 0.1 in
- Highest reading98°F (May 28, 2019)
- Lowest reading48°F (May 8, 1992)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
May compared with April and June
| April | May | June | |
|---|---|---|---|
| Normal high | 76°F | 83°F | 88°F |
| Normal low | 60°F | 68°F | 74°F |
| Wet days | 7 | 7 | 11 |
| Comfortable days | 12 | 4 | 0 |
| Daylight | 12.9 h | 13.7 h | 14.1 h |
Highs change by +7°F from April and +5°F into June.
Nearby alternatives in May
- Warmer: Orlando, FL179 mi · high 88°F · 8 wet days
How St. Simons Island ranks in May
- Normal high92nd warmest of 378 cities; 5th of 8 in Georgia
- Wet days104th driest of 378
- Comfortable days277th most of 339
What to pack for St. Simons Island in May
- A swimsuit – about 18 beach days
Heating and cooling
May has 3 heating degree days and 333 cooling degree days (base 65°F), 8% of the year's total heating and cooling demand.
Questions
How hot is St. Simons Island in May?
The normal high is 83°F and the normal low is 68°F. From 1991 to 2020 the hottest May reading was 98°F (most recently on May 28, 2019).
Does it rain a lot in St. Simons Island in May?
About 7 days in May have at least 0.01 in of precipitation, and the normal total is 2.3 in. The wettest May in 1991-2020 was in 2012 (7.1 in); the driest was in 1996 (0.1 in).
Is May a good time to visit St. Simons Island?
May ranks 7th of 12 months on our comfort score for St. Simons Island (56 out of 100). It has about 4 comfortable days and about 3 days at 90°F or hotter. The best months are March, April and November.
Where the numbers come from
- Temperature, rain, frost dates and humidity and wind by hour: Brunswick Malcolm Mckinnon Airport (USW00013878), 1.2 mi N of the city center, 16 ft . NOAA normals and daily records, 1991-2020.
- Snowfall: Brunswick (USC00091340), 7.0 mi WNW of the city center, 13 ft . NOAA normals and daily records, 1991-2020.
- Snow depth: Sapelo Is (USC00097808), 19 mi NNE of the city center, 10 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Malcolm Mc Kinnon Airport (722137-13878), 1.2 mi N of the city center, 14 ft . Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).