Climateby Month

Napa vs Santa Barbara weather

Napa, CA and Santa Barbara, CA · 304 mi apart

July highs: 83°F in Napa, 76°F in Santa Barbara (Napa is 7°F warmer). January highs: 59°F and 67°F (Santa Barbara is 8°F warmer). Napa has about 68 wet days a year, Santa Barbara about 40.

Napa, CA

30°40°50°60°70°80°90° January: normal high 59°F (15°C), low 40°F (4°C) 59° 40° February: normal high 63°F (17°C), low 42°F (6°C) March: normal high 68°F (20°C), low 44°F (7°C) April: normal high 72°F (22°C), low 46°F (8°C) May: normal high 77°F (25°C), low 50°F (10°C) June: normal high 82°F (28°C), low 54°F (12°C) July: normal high 83°F (28°C), low 56°F (13°C) August: normal high 84°F (29°C), low 56°F (13°C) 84° 56° September: normal high 84°F (29°C), low 53°F (12°C) October: normal high 78°F (26°C), low 49°F (9°C) November: normal high 66°F (19°C), low 44°F (7°C) December: normal high 59°F (15°C), low 40°F (4°C) JFMAMJJASOND

Best months: May

Santa Barbara, CA

30°40°50°60°70°80°90° January: normal high 67°F (19°C), low 47°F (8°C) February: normal high 67°F (19°C), low 47°F (8°C) March: normal high 68°F (20°C), low 49°F (9°C) April: normal high 71°F (22°C), low 51°F (11°C) May: normal high 72°F (22°C), low 54°F (12°C) June: normal high 73°F (23°C), low 57°F (14°C) July: normal high 76°F (24°C), low 60°F (16°C) August: normal high 78°F (26°C), low 60°F (16°C) 78° 60° September: normal high 78°F (26°C), low 60°F (16°C) October: normal high 76°F (24°C), low 56°F (13°C) November: normal high 71°F (22°C), low 50°F (10°C) December: normal high 66°F (19°C), low 46°F (8°C) 66° 46° JFMAMJJASOND

Best months: June

Which city for what

  • Milder winters: Santa Barbara (January high 67°F vs January high 59°F)
  • Cooler summers: Santa Barbara (July high 76°F vs July high 83°F)
  • Fewer wet days: Santa Barbara (40 a year vs 68 a year)
  • More comfortable days: Santa Barbara (231 a year vs 160 a year)

Listed only where the difference is at least 3°F in highs, 10 days a year or 3 in of snow.

Season by season

SeasonAvg high NapaAvg high Santa BarbaraWet days NapaWet days Santa Barbara
Winter (Dec-Feb)60°F67°F3420
Spring (Mar-May)72°F70°F2012
Summer (Jun-Aug)83°F76°F12
Fall (Sep-Nov)76°F75°F136

Side by side over a year

NapaSanta Barbara
Hot days (90°F+)325
Freezing nights120
Muggy days01
Comfortable days160231
Precipitation26.7 in19.0 in
Snowfall0.0 in0.0 in
Frost dateslast Feb 12, first Dec 4frost in about 11% of years
Daylight in June / December14.8 h / 9.6 h14.4 h / 9.9 h
Best monthsMayJune

Day counts from each city's daily records, 1991-2020. Comfortable days: highs 65-80°F and dew point under 60°F.

Month by month

MonthHigh NapaHigh Santa BarbaraWet days NapaWet days Santa Barbara
January59°F67°F127
February63°F67°F117
March68°F68°F107
April72°F71°F73
May77°F72°F42
June82°F73°F12
July83°F76°F00
August84°F78°F00
September84°F78°F11
October78°F76°F42
November66°F71°F83
December59°F66°F126

Both charts use the same temperature scale.

Where the numbers come from

  • Napa, CA: temperature from Napa State Hospital (USC00046074), 1.8 mi SE of the city center; precipitation from Napa State Hospital (USC00046074). NOAA 1991-2020 normals and daily records.
  • Santa Barbara, CA: temperature from Santa Barbara (USC00047902), 0.8 mi ESE of the city center; precipitation from Santa Barbara (USC00047902). NOAA 1991-2020 normals and daily records.

Every station for each city, including humidity and frost, is listed on the city page. Methodology.