James Island, Charleston Weather
James Island weather this week
Over the next 7 days in James Island, daytime highs range from 14°C to 21°C and night-time lows from 5°C to 11°C. The warmest afternoon is likely on Thursday at 21°C, while the coolest night is expected on Sunday night at 5°C. Temperatures trend warmer through the week, rising by about 3°C.
No significant rain is expected in James Island this week. The highest rain chance is just 2%, on Tuesday.
Winds stay mostly light this week, peaking at about 22 km/h on Thursday. UV levels stay moderate or lower, peaking at 5. Average humidity is a comfortable 59% or so.
| Day | Conditions | High / Low | Rain chance | Rain | Max wind |
|---|---|---|---|---|---|
| Today (Friday) | Overcast | 18° / 8° | 0% | 0.0 mm | 18 km/h |
| Tomorrow (Saturday) | Overcast | 15° / 6° | 0% | 0.0 mm | 20 km/h |
| Sunday | Overcast | 14° / 5° | 0% | 0.0 mm | 20 km/h |
| Monday | Overcast | 14° / 8° | 1% | 0.0 mm | 15 km/h |
| Tuesday | Overcast | 17° / 9° | 2% | 0.0 mm | 22 km/h |
| Wednesday | Clear sky | 18° / 10° | 1% | 0.0 mm | 22 km/h |
| Thursday | Partly cloudy | 21° / 11° | 1% | 0.0 mm | 22 km/h |
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Today's outlook for James Island
At 23:00 local time it is 11°C in James Island under overcast skies, feeling like 7°C. Today's forecast high is 18°C and the low is 8°C, and the day overall looks overcast. Rain is unlikely today (0% chance). Winds are blowing at about 16 km/h from the north-west. Humidity is 47%.
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Climate of James Island: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in James Island, with average daytime highs around 32°C. January is the coolest, when nights typically fall to about 4°C.
The area receives about 1250 mm of rain in a typical year. Most of it falls from June to October (around 55% of the yearly total), and August is the wettest month at roughly 171 mm.
For outdoor plans and travel, March to May and November usually offer the most comfortable weather in James Island, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 14° | 4° | 61 mm | 80% |
| Feb | 16° | 6° | 84 mm | 80% |
| Mar | 20° | 9° | 84 mm | 78% |
| Apr | 24° | 13° | 82 mm | 75% |
| May | 28° | 18° | 92 mm | 73% |
| Jun | 31° | 22° | 140 mm | 76% |
| Jul | 32° | 24° | 147 mm | 76% |
| Aug | 31° | 23° | 171 mm | 79% |
| Sep | 29° | 21° | 119 mm | 80% |
| Oct | 25° | 15° | 105 mm | 78% |
| Nov | 20° | 9° | 69 mm | 79% |
| Dec | 16° | 6° | 91 mm | 82% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around James Island. Values describe typical conditions, not a forecast.
About James Island weather
James Island lies in South Carolina's humid subtropical climate, coastal and low-lying for much of the state — about 170 km south-east of Columbia. Expect hot, humid summers (June–August) with highs commonly in the low-to-mid 30s°C. Winter brings mild winters (December–February), rarely dropping below freezing near the coast. This page shows live, auto-refreshing weather for James Island: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/New_York.
Frequently asked questions
James Island is about 170 km south-east of Columbia, in South Carolina.
James Island sees mild winters (December–February), rarely dropping below freezing near the coast.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for James Island's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in James Island, with average daytime highs of about 32°C and nights around 24°C.
The coldest nights come in January, when the average low is about 4°C and daytime highs reach around 14°C.
James Island receives about 1250 mm of rain in a typical year. August is the wettest month at roughly 171 mm, and the main rainy period is June to October.
March to May and November usually offer the most comfortable weather in James Island, with mild daytime temperatures and little rain.
In November James Island typically sees daytime highs near 20°C and lows near 9°C, with about 69 mm of rain over the month and average humidity around 79%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
The current temperature for James Island updates automatically at the top of this page — scroll to the hourly strip below to see how it's expected to change over the day.
James Island's day-to-day weather follows the broader pattern of South Carolina described above. See the hourly weather forecast or the air quality index for more detail.