Humid subtropical climate
Climate Johnston - South Carolina
Annual high73ºF
Annual low50ºF
Precipitation46.91 inch
| Month | HighºF | LowºF | Precipinch | Snowinch |
|---|---|---|---|---|
| Jan | 53 | 31 | 4.35 | 1 |
| Feb | 57 | 35 | 4.18 | 0 |
| Mar | 65 | 41 | 4.53 | 0 |
| Apr | 73 | 47 | 3.09 | 0 |
| May | 82 | 56 | 2.99 | 0 |
| Jun | 88 | 65 | 4.64 | 0 |
| Jul | 91 | 68 | 4.19 | 0 |
| Aug | 89 | 67 | 4.89 | 0 |
| Sep | 83 | 61 | 3.67 | 0 |
| Oct | 74 | 50 | 3.43 | 0 |
| Nov | 65 | 41 | 3.37 | 0 |
| Dec | 55 | 33 | 3.58 | 0 |
- JanHigh 53ºFLow 31ºFPrecip 4.35 inch
- FebHigh 57ºFLow 35ºFPrecip 4.18 inch
- MarHigh 65ºFLow 41ºFPrecip 4.53 inch
- AprHigh 73ºFLow 47ºFPrecip 3.09 inch
- MayHigh 82ºFLow 56ºFPrecip 2.99 inch
- JunHigh 88ºFLow 65ºFPrecip 4.64 inch
- JulHigh 91ºFLow 68ºFPrecip 4.19 inch
- AugHigh 89ºFLow 67ºFPrecip 4.89 inch
- SepHigh 83ºFLow 61ºFPrecip 3.67 inch
- OctHigh 74ºFLow 50ºFPrecip 3.43 inch
- NovHigh 65ºFLow 41ºFPrecip 3.37 inch
- DecHigh 55ºFLow 33ºFPrecip 3.58 inch
Climate summary
What is the average weather in Johnston, South Carolina?
Johnston experiences a humid subtropical climate, characterized by hot summers and cold winters with strong seasonal contrast. Rainfall is fairly wet and spread evenly throughout the year, though summer brings heavy seasonal downpours and afternoon thunderstorms. The area receives little snowfall annually.
Johnston weather averages
Annual high73ºF
Annual low50ºF
Precipitation46.91 inch
Snowfall1 inch
Daily normals Johnston - South Carolina - January
| Day | HighºF | LowºF | Prec/ | Prec/ | Snow/ | Snow/ |
|---|---|---|---|---|---|---|
| Jan 1 | 55.5 | 32.9 | 0.14 | 0.14 | 0.00 | 0.00 |
| Jan 2 | 55.4 | 32.9 | 0.28 | 0.28 | 0.00 | 0.00 |
| Jan 3 | 55.4 | 32.8 | 0.42 | 0.42 | 0.00 | 0.00 |
| Jan 4 | 55.3 | 32.7 | 0.56 | 0.56 | 0.10 | 0.10 |
| Jan 5 | 55.3 | 32.7 | 0.71 | 0.71 | 0.10 | 0.10 |
| Jan 6 | 55.2 | 32.6 | 0.86 | 0.86 | 0.10 | 0.10 |
| Jan 7 | 55.2 | 32.6 | 0.99 | 0.99 | 0.10 | 0.10 |
| Jan 8 | 55.1 | 32.5 | 1.13 | 1.13 | 0.20 | 0.20 |
| Jan 9 | 55.1 | 32.5 | 1.26 | 1.26 | 0.20 | 0.20 |
| Jan 10 | 55.1 | 32.5 | 1.40 | 1.40 | 0.20 | 0.20 |
| Jan 11 | 55.1 | 32.4 | 1.54 | 1.54 | 0.20 | 0.20 |
| Jan 12 | 55.1 | 32.4 | 1.68 | 1.68 | 0.20 | 0.20 |
| Jan 13 | 55.1 | 32.4 | 1.81 | 1.81 | 0.20 | 0.20 |
| Jan 14 | 55.1 | 32.4 | 1.95 | 1.95 | 0.30 | 0.30 |
| Jan 15 | 55.1 | 32.4 | 2.08 | 2.08 | 0.30 | 0.30 |
| Jan 16 | 55.1 | 32.5 | 2.22 | 2.22 | 0.30 | 0.30 |
| Jan 17 | 55.1 | 32.5 | 2.36 | 2.36 | 0.30 | 0.30 |
| Jan 18 | 55.2 | 32.5 | 2.49 | 2.49 | 0.30 | 0.30 |
| Jan 19 | 55.2 | 32.5 | 2.62 | 2.62 | 0.30 | 0.30 |
| Jan 20 | 55.3 | 32.6 | 2.76 | 2.76 | 0.40 | 0.40 |
| Jan 21 | 55.3 | 32.6 | 2.89 | 2.89 | 0.40 | 0.40 |
| Jan 22 | 55.4 | 32.7 | 3.03 | 3.03 | 0.40 | 0.40 |
| Jan 23 | 55.5 | 32.7 | 3.16 | 3.16 | 0.40 | 0.40 |
| Jan 24 | 55.5 | 32.8 | 3.29 | 3.29 | 0.40 | 0.40 |
| Jan 25 | 55.6 | 32.8 | 3.43 | 3.43 | 0.40 | 0.40 |
| Jan 26 | 55.7 | 32.9 | 3.56 | 3.56 | 0.40 | 0.40 |
| Jan 27 | 55.8 | 33.0 | 3.69 | 3.69 | 0.40 | 0.40 |
| Jan 28 | 55.9 | 33.1 | 3.83 | 3.83 | 0.50 | 0.50 |
| Jan 29 | 56.1 | 33.2 | 3.96 | 3.96 | 0.50 | 0.50 |
| Jan 30 | 56.2 | 33.3 | 4.10 | 4.10 | 0.50 | 0.50 |
| Jan 31 | 56.3 | 33.3 | 4.23 | 4.23 | 0.50 | 0.50 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Johnston - August 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Aug 1 | – | – | – |
| Aug 2 | – | – | – |
| Aug 3 | – | – | – |
| Aug 4 | – | – | – |
| Aug 5 | – | – | – |
| Aug 6 | – | – | – |
| Aug 7 | – | – | – |
| Aug 8 | – | – | – |
| Aug 9 | – | – | – |
| Aug 10 | – | – | – |
| Aug 11 | – | – | – |
| Aug 12 | – | – | – |
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| Aug 15 | – | – | – |
| Aug 16 | – | – | – |
| Aug 17 | – | – | – |
| Aug 18 | – | – | – |
| Aug 19 | – | – | – |
| Aug 20 | – | – | – |
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| Aug 26 | – | – | – |
| Aug 27 | – | – | – |
| Aug 28 | – | – | – |
| Aug 29 | – | – | – |
| Aug 30 | – | – | – |
| Aug 31 | – | – | – |
The data for August 2026 is incomplete: some days or values are missing.
- –No data
- –Not yet observed or received
- TTrace, too small to measure
Observed extremes
Geo Johnston - South Carolina
Location
- Country
- United States
- State
- South Carolina
- County
- Edgefield
- City
- Johnston
- Zip Code
- 29832
- Elevation
- 653 ft
- Longitude
- -81.80
- Latitude
- 33.83
- ICAO
- –
- IATA
- –