Weather StoryAlmanac, microseasons, and the day's weather story.

Weather in San Anselmo, California

Fog and sun in daily rhythm. Day 58 of spring. Read this microseason across nine climate regions →

San Anselmo, CA
Saturday, May 16 at 11:59 PM
68
°
Clear
Feels like
61°
Humidity
45%
Wind
17 mph
Sunrise
5:58 AM
Sunset
8:14 PM
San Anselmo, CA
Hour by hour · 24h
80°
4p
75°
5p
72°
6p
68°
7p
63°
8p
60°
9p
58°
10p
56°
11p
55°
12a
54°
1a
53°
2a
52°
3a
51°
4a
51°
5a
50°
6a
53°
7a
61°
8a
67°
9a
71°
10a
75°
11a
76°
12p
77°
1p
77°
2p
77°
3p
L 50°H 80°
San Anselmo, CA
7-day forecast
  1. Today
    May 16
    Overcast
    —
    72°53°
  2. Sunday
    May 17
    Overcast
    —
    74°51°
  3. Monday
    May 18
    Mostly Clear
    —
    81°57°
  4. Tuesday
    May 19
    Mostly Clear
    —
    87°54°
  5. Wednesday
    May 20
    Overcast
    —
    82°52°
  6. Thursday
    May 21
    Overcast
    —
    84°51°
  7. Friday
    May 22
    Foggy
    —
    80°50°
San Anselmo, CA
Next 24 hours · Warm now
HOT 90°40°65°90°6p12a6a12pnow 80°high 80°low 50°
San Anselmo, CA
Anemometer · 24h winds · from true
NESW
From · True
NW
307° · veering 10°
Direction
NW
307°
Sustained
17
mph
Gust
28
mph
Peak 24h
39
avg 13
Beaufort · 4 · MOD BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 13 · pk 39 @ 5:00a
−24h−18h−12h−6hnow
Sustained 17 mph with gusts pulsing to 28 — flags snap, branches bend.
San Anselmo, CA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1010.8
+0.5 mb in 3h · steady · 29.85 inHg
Now
1010.8
mb
3h
+0.5
mb
12h
-2.7
mb
24h
-0.8
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1010–1014
−24h−18h−12h−6hnow
Air sits at the threshold — small shifts decide the day.
San Anselmo, CA
Air quality
38
AQI
Good
PM 2.5
6.7 μg/m³
PM 10
10.4 μg/m³
NO₂
1.1 μg/m³
Ozone
83.0 μg/m³
UV Index
4.1 Moderate
San Anselmo, CA
Almanac · Saturday, May 16
Flowers blooming in late autumn, a sure sign of a bad winter coming.
Civil dawn
12:30 PM
Sunrise
5:58 AM
Daylight
14h 16m
Sunset
8:14 PM
Civil dusk
3:45 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
San Anselmo, CA
The moon
New Moon
0% illuminated
Moonrise
12:26 PM
Moonset
2:33 AM
In sign
♉︎ Taurus
San Anselmo, CA
Microseason · 28 of 72
May 16–20

Fog and sun in daily rhythm

weather
Jan 137% of the yearDec 31

Read this microseason across nine climate regions →

San Anselmo at a glance

  • Today vs. normal: 6°F below the seasonal normal for this latitude
  • Last frost: April 4 (climatological average for this latitude)
  • Microseason: 28 of 72, May 16–20
  • Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.

Right now in the garden

Warm-season window is open

As of May 16, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.

All cities in California →

ZIP codes in San Anselmo

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.