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St. Helena (NVV Office)

Current Conditions

8/24/26 9:45 AM (-07:00)
Updated Every 15 Minutes
Temp 66.8 °F   3.9
Wind Spd 1.1 mph   0.5
Wind Dir NE | 54 °
Wind Gust 3.3 mph   0.7
Wind Gst Dir E | 89 °
Latest Rain 0.00 In
Daily Rain 0.00 In
Daily Max Temp 68.5 °F   3.2
Daily Min Temp 59.8 °F   8.4
Daily Max Wind 5.3 mph   0.7
Max Wind Dir NW | 323 °

St. Helena (NVV Office)

Current Conditions

8/24/26 9:45 AM (-07:00)
Updated Every 15 Minutes
Daily Rain 0.00 In
Month Precip 0.00 In
Season Precip 0.00 In
Yest MaxT 98.8 °F
Yest MinT 51.4 °F
Yest MaxGst 10.7 mph
Yest Precip 0.00 In

Last 7 Days

St. Helena (NVV Office)

Daily Data | America/Los_Angeles
as of 8/24/26 9:49 AM PDT
Load Interactive
Date Daily Max Temp (°F) Daily Min Temp (°F) Wind Spd (mph) Wind Dir (°) Daily Max Wind (mph) Time of Max Wind Daily Rain (In) Season Precip (In) GDDs (DL) Chilling <=45F (hrs) Powdery Mildew Stress (pts) MinBV Day (V)
8/23/26 98.8 51.4 1.5 ESE | 109 10.7 1545 0.00 0.00 23.4 0.0 0 12.6
8/22/26 92.1 50.4 1.1 ESE | 108 9.7 1641 0.00 0.00 20.7 0.0 0 12.6
8/21/26 95.1 56.0 1.5 ESE | 117 10.2 1654 0.00 0.00 21.0 0.0 0 12.6
8/20/26 92.2 55.8 1.5 ESE | 105 9.4 1731 0.00 0.00 18.6 0.0 0 12.6
8/19/26 92.5 57.3 1.6 ESE | 110 8.8 1651 0.00 0.00 19.6 0.0 0 12.6
8/18/26 92.7 52.8 1.6 ESE | 103 8.2 1817 0.00 0.00 19.7 0.0 0 12.6
8/17/26 90.4 57.3 1.5 ESE | 102 10.0 1635 0.00 0.00 20.1 0.0 10 12.6
Max 98.8 57.3 1.6 - 10.7 - 0.00 0.00 23.4 0.0 - 12.6
Avg - - 1.5 - - - - - 20.4 0.0 - -
Min 90.4 50.4 1.1 - 8.2 - 0.00 0.00 18.6 0.0 - 12.6
Total - - - - - - - - 143.0 0.0 - -

Climate Summary

St. Helena (NVV Office)

Current Year | Showing 1/1/26 - 8/23/26
as of 8/24/26 9:49 AM PDT
Temperature (°F) Max Wind Gust (mph) Precip (in) Days
Month Days Avg High Avg Low Max Min Avg Max Total Daily Min Temp < 28 Daily Min Temp < 32 Daily Max Temp > 90 Daily Max Temp > 100 Daily Rain > 0.25 Daily Rain > 1 Daily Max Wind > 25
Jan 2026 31 65.3 38.6 81.6 31.5 8.9 17.5 4.49 0 2 0 0 5 2 0
Feb 2026 28 66.9 42 83.4 28.8 9.9 18.8 5.23 0 3 0 0 6 2 0
Mar 2026 31 83.1 46.9 95.3 40.2 10.9 19.9 0.35 0 0 8 0 1 0 0
Apr 2026 30 73.4 45.7 87.3 39.4 11.1 18 4.09 0 0 0 0 5 2 0
May 2026 31 81.7 51.4 96.1 46 11.6 23.5 1.18 0 0 4 0 3 0 0
Jun 2026 30 90 54.9 109.1 48.6 11.4 16.3 0 0 0 11 3 0 0 0
Jul 2026 31 92.1 55.5 105.9 49.9 10.3 12.3 0 0 0 20 4 0 0 0
Aug 2026 23 92.5 55.9 105 50.4 10 12.5 0 0 0 17 2 0 0 0
Total 235 - - - - - - 15.34 0 5 60 9 20 6 0
Average 29.4 80.4 48.7 80.4 48.7 10.5 - 1.92 0 0.6 7.5 1.1 2.5 0.8 0
Maximum 31 92.5 55.9 109.1 - - 23.5 5.23 0 3 20 4 6 2 0
Minimum 23 65.3 38.6 - 28.8 - - 0 0 0 0 0 0 0 0