Myrtle Beach, South Carolina Weather
Fireflies pulse through the magnolias. Day 77 of spring. Read this microseason across nine climate regions →
Myrtle Beach weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Partly Cloudy——82°58°—
- FridayJun 5Clear——85°62°+3°
- SaturdayJun 6Overcast——89°66°+4°
- SundayJun 7Overcast——90°66°+1°
- MondayJun 8Overcast18%—92°69°+2°
- TuesdayJun 9Drizzle18%0.09″75°65°-17°
- WednesdayJun 10Overcast10%—79°62°+4°
Ozone at AQI 75 now. AQI flat over the last 6 hours (within ±4 points). With UV 8.4 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 84 by mid-afternoon.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 75 now. With UV 8.4 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 84 by mid-afternoon.
- Present
- AQI 75
- UV peak
- 8.4 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 84
PM × Wind × Precip
PM2.5 at 4.8 µg/m³ (AQI 27) with a 0.79 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.79
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 3:24 AM
- Moonset
- 1:33 PM
- In sign
- ♒︎ Aquarius
Fireflies pulse through the magnolias
Myrtle Beach at a glance
- Today vs. normal: 82°F — typical for the season
- Last frost: March 9 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | lettuce, peas, spinach, radishes | — |
| April | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | — |
| May | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | — | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | — | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | fall brassicas, garlic (overwinter), carrots | — |
| December | — | — |
A year in weather
July brings Myrtle Beach's warmest temperatures (~80°F mean) while January delivers the coldest (~45°F). Rainfall reaches its peak in September (6.8 inches) and drops to its lowest point in November (3.1 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 45° | 3.4″ | 11 |
| February | 47° | 3.8″ | 13 |
| March | 53° | 3.7″ | 12 |
| April | 61° | 3.4″ | 11 |
| May | 69° | 3.8″ | 13 |
| June | 76° | 4.8″ | 16 |
| July | 80° | 6.6″ | 22 |
| August | 78° | 6.3″ | 21 |
| September | 74° | 6.8″ | 23 |
| October | 65° | 4.1″ | 14 |
| November | 54° | 3.1″ | 10 |
| December | 47° | 3.8″ | 13 |
Regional context
Myrtle Beach falls within a humid subtropical climate region that encompasses nearby cities with similar temperature ranges, seasonal patterns, and growing conditions.
Similar climates: Charleston, SC, Columbia, SC, Greenville, SC, Rock Hill, SC, Spartanburg, SC.
Naturalist notes
Late May brings the peak migration of painted buntings through coastal South Carolina, their brilliant plumage visible in scrubland edges.
Southern magnolia trees begin their flowering cycle in late May, releasing their distinctive fragrance across the coastal plain.
Frequently asked
- When does it freeze in Myrtle Beach?
- The last spring frost in Myrtle Beach typically occurs around mid-March, while the first fall frost arrives around mid-December.
- What is the rainy season in Myrtle Beach?
- September stands as the wettest month with about 6.8 inches of rain on average; the city receives roughly 54 inches annually.
- What is the warmest month in Myrtle Beach?
- July typically brings the warmest weather, averaging about 80°F.
- What is the coldest month in Myrtle Beach?
- January typically delivers the coldest temperatures, averaging about 45°F.
- When can I start a vegetable garden in Myrtle Beach?
- Cool-season crops (peas, lettuce) can be planted around the last spring frost (mid-March); warm-season crops (tomatoes, peppers) should wait until 1–2 weeks after.
- How many rainy days does Myrtle Beach get?
- Myrtle Beach experiences about 179 rainy days per year on average.
- What hardiness zone is Myrtle Beach?
- The USDA hardiness zone for Myrtle Beach depends on its lowest average winter temperature; use the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Myrtle Beach, South Carolina sits in a humid subtropical climate zone. January temperatures hover near 45°F while July averages 80°F — a 35°F seasonal swing.
Throughout the year, Myrtle Beach receives about 54 inches of precipitation spread over roughly 179 rainy days.
Several factors shape the local weather patterns: latitude (33.7°N), proximity to large water bodies, and elevation. These elements determine what grows here, when frost occurs, and the daily weather patterns.