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St. Helena (NVV Office)

Current Conditions

4/20/26 2:00 AM (-07:00)
Updated Every 15 Minutes
Temp 48.7 °F   3.9
Wind Spd 0.1 mph   0.1
Wind Dir S | 173 °
Wind Gust 0.9 mph   0.9
Wind Gst Dir SE | 132 °
Latest Rain 0.00 In
Daily Rain 0.00 In
Daily Max Temp 51.8 °F   2.5
Daily Min Temp 48.2 °F   4.2
Daily Max Wind 2.8 mph   1.9
Max Wind Dir SE | 129 °

St. Helena (NVV Office)

Current Conditions

4/20/26 2:00 AM (-07:00)
Updated Every 15 Minutes
Daily Rain 0.00 In
Month Precip 2.52 In
Season Precip 26.38 In
Yest MaxT 78.1 °F
Yest MinT 46.2 °F
Yest MaxGst 9.6 mph
Yest Precip 0.00 In

Last 7 Days

St. Helena (NVV Office)

Daily Data | America/Los_Angeles
as of 4/20/26 2:08 AM PDT
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)
4/19/26 78.1 46.2 1.0 WNW | 297 9.6 1702 0.00 26.38 10.6 0.0 90 12.6
4/18/26 79.6 39.4 1.0 ENE | 59 8.6 1438 0.00 26.38 12.7 5.3 70 12.6
4/17/26 79.0 45.6 2.0 NW | 326 18.0 0213 0.00 26.38 13.4 0.0 50 12.6
4/16/26 74.2 43.6 2.4 NNW | 337 16.6 1446 0.00 26.38 11.2 1.4 30 12.6
4/15/26 71.7 41.5 1.6 WNW | 292 11.8 1858 0.00 26.38 8.1 5.9 40 12.6
4/14/26 70.4 40.2 1.1 WSW | 245 10.0 1532 0.00 26.38 6.6 5.0 50 12.6
4/13/26 69.9 43.2 1.1 NW | 304 9.2 1756 0.00 26.38 6.7 3.2 60 12.6
Max 79.6 46.2 2.4 - 18.0 - 0.00 26.38 13.4 5.9 - 12.6
Avg - - 1.5 - - - - - 9.9 3.0 - -
Min 69.9 39.4 1.0 - 8.6 - 0.00 26.38 6.6 0.0 - 12.6
Total - - - - - - - - 69.4 20.8 - -

Climate Summary

St. Helena (NVV Office)

Current Year | Showing 1/1/26 - 4/19/26
as of 4/20/26 2:08 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 19 74.6 45.6 87.3 39.4 11.6 18 2.52 0 0 0 0 3 1 0
Total 109 - - - - - - 12.59 0 5 8 0 15 5 0
Average 27.2 72.4 43 72.4 43 10.2 - 3.15 0 1.2 2 0 3.8 1.2 0
Maximum 31 83.1 46.9 95.3 - - 19.9 5.23 0 3 8 0 6 2 0
Minimum 19 65.3 38.6 - 28.8 - - 0.35 0 0 0 0 1 0 0