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Weather in St. Johns, Arizona

Saguaro crowns open white. Day 58 of spring. Read this microseason across nine climate regions →

St. Johns, AZ
Saturday, May 16 at 11:41 PM
80
°
Clear
Feels like
66°
Humidity
9%
Wind
21 mph
Sunrise
5:14 AM
Sunset
7:13 PM
St. Johns, AZ
Hour by hour · 24h
83°
4p
81°
5p
79°
6p
75°
7p
72°
8p
68°
9p
64°
10p
63°
11p
61°
12a
60°
1a
58°
2a
57°
3a
56°
4a
54°
5a
54°
6a
61°
7a
66°
8a
71°
9a
74°
10a
76°
11a
80°
12p
82°
1p
83°
2p
84°
3p
L 54°H 84°
St. Johns, AZ
7-day forecast
  1. Today
    May 16
    Clear
    83°50°
  2. Sunday
    May 17
    Overcast
    77°52°
  3. Monday
    May 18
    Clear
    71°46°
  4. Tuesday
    May 19
    Overcast
    77°49°
  5. Wednesday
    May 20
    Overcast
    75°52°
  6. Thursday
    May 21
    Overcast
    79°56°
  7. Friday
    May 22
    Partly Cloudy
    80°54°
St. Johns, AZ
Anemometer · 24h winds · from true
NESW
From · True
WSW
245° · steady
Direction
WSW
245°
Sustained
21
mph
Gust
27
mph
Peak 24h
29
avg 11
Beaufort · 5 · FRESH 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 11 · pk 29 @ 7:00p
−24h−18h−12h−6hnow
A fresh breeze drives the wsw-bound air across the harbor.
St. Johns, AZ
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
821.7
+1.6 mb in 3h · falling · 24.26 inHg
Now
821.7
mb
3h
+1.6
mb
12h
-4.4
mb
24h
+0.4
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 819826
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
St. Johns, AZ
Air quality
78
AQI
Moderate
PM 2.5
2.3 μg/m³
PM 10
5.9 μg/m³
NO₂
0.2 μg/m³
Ozone
129.0 μg/m³
UV Index
3.3 Moderate
St. Johns, AZ
Almanac · Saturday, May 16
Flowers blooming in late autumn, a sure sign of a bad winter coming.
Civil dawn
11:47 AM
Sunrise
5:14 AM
Daylight
13h 59m
Sunset
7:13 PM
Civil dusk
2:42 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
St. Johns, AZ
The moon
New Moon
0% illuminated
Moonrise
11:42 AM
Moonset
1:28 AM
In sign
♉︎ Taurus
St. Johns, AZ
Microseason · 28 of 72
May 16–20

Saguaro crowns open white

weather
Jan 137% of the yearDec 31

Read this microseason across nine climate regions →

St. Johns at a glance

  • Today vs. normal: 3°F above the seasonal normal for this latitude
  • Last frost: March 14 (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

Peak growing season

As of May 16, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.

ZIP codes in St. Johns

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.