December 2017 Weather History in Healdsburg California, United States

The data for this report comes from the Sonoma County Airport. See all nearby weather stations

This report shows the past weather for Healdsburg, providing a weather history for December 2017. It features all historical weather data series we have available, including the Healdsburg temperature history for December 2017. You can drill down from year to month and even day level reports by clicking on the graphs.

Healdsburg Temperature History December 2017

Temperature history in December 2017 in Healdsburg18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313125°F25°F30°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°FNovJan
The daily range of reported temperatures (gray bars) and 24-hour highs (red ticks) and lows (blue ticks), placed over the daily average high (faint red line) and low (faint blue line) temperature, with 25th to 75th and 10th to 90th percentile bands.

Hourly Temperature in December 2017 in Healdsburg

Hourly Temperature in December 2017 in Healdsburg18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMNovJanvery coldcoldcoolfreezing
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The hourly reported temperature, color coded into bands. The shaded overlays indicate night and civil twilight.
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Cloud Cover in December 2017 in Healdsburg

Cloud Cover in December 2017 in Healdsburg18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMNovJan
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
no significant cloudno cloud detectedceiling and visibility ok
The hourly reported cloud coverage, categorized by the percentage of the sky covered by clouds.

Daily Precipitation in December 2017 in Healdsburg

Daily Precipitation in December 2017 in Healdsburg1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 inNovJan
The daily measured quantity of liquid or liquid-equivalent precipitation.

Observed Weather in December 2017 in Healdsburg

Observed Weather in December 2017 in Healdsburg18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMNovJan
foghazedrizzlelight rainmoderate rainheavy rainfreezing rainsleetsnow grainslight snowmoderate snowheavy snowhailthunderstorm
The hourly observed weather, color coded by category (in order of severity). If multiple reports are present, the most severe code is shown.
DayObservationsPrecipitationCodes
Fri, Dec 1 Fog, Mist, Patches of FogFG, BR, BCFG
Sat, Dec 2 Light Rain, Mist0.04 in-RA, BR
Sun, Dec 3 Mist, Patches of FogBR, BCFG
Wed, Dec 6 Mist0.00 inBR
Fri, Dec 8 MistBR
Sat, Dec 9 Fog, Freezing Fog, MistFG, FZFG, BR
Sun, Dec 10 Fog, Freezing Fog, Mist, Patches of FogFG, FZFG, BR, BCFG
Mon, Dec 11 Fog, Freezing Fog, MistFG, FZFG, BR
Tue, Dec 12 Fog, Freezing Fog, MistFG, FZFG, BR
Wed, Dec 13 Fog, Mist, Patches of FogFG, BR, BCFG
Thu, Dec 14 Fog, Mist, Patches of FogFG, BR, BCFG
Fri, Dec 15 Haze, Fog, Mist0.00 inHZ, FG, BR
Tue, Dec 19 Light Rain, Haze, Mist, Shallow Fog0.04 in-RA, HZ, BR, MIFG
Sat, Dec 23 Mist, Patches of FogBR, BCFG
Tue, Dec 26 Fog, Freezing Fog, Mist, Patches of FogFG, FZFG, BR, BCFG
Wed, Dec 27 Fog, Mist, Patches of FogFG, BR, BCFG
Thu, Dec 28 Fog, Mist, Patches of FogFG, BR, BCFG
Fri, Dec 29 Fog, Mist, Patches of FogFG, BR, BCFG
Sat, Dec 30 Fog, Freezing Fog, Mist, Patches of FogFG, FZFG, BR, BCFG
Sun, Dec 31 Fog, Mist, Patches of Fog0.00 inFG, BR, BCFG

Hours of Daylight and Twilight in December 2017 in Healdsburg

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

Sunrise & Sunset with Twilight in December 2017 in Healdsburg

The solar day over the course of December 2017. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Solar Elevation and Azimuth in December 2017 in Healdsburg

Solar Elevation and Azimuth in December 2017 in HealdsburgDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMNovJan0010102020001010202030
northeastsouthwest
Solar elevation and azimuth over the course of December 2017. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

Moon Rise, Set & Phases in December 2017 in Healdsburg

Moon Rise, Set & Phases in December 2017 in Healdsburg18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNovJanDec 37:48 AMDec 37:48 AMDec 1710:31 PMDec 1710:31 PMJan 16:25 PMJan 16:25 PM4:34 PM4:34 PM7:00 AM7:00 AM6:40 AM6:40 AM4:52 PM4:52 PM5:02 PM5:02 PM7:55 AM7:55 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.
Dec 2017IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
97%-4:36 AMWNW3:50 PMENE10:46 PMS224,717 mi
2
100%-5:48 AMWNW4:34 PMENE11:45 PMS222,799 mi
3
100%-7:00 AMWNW5:25 PMENE--
4
99%-8:10 AMWNW6:23 PMENE12:46 AMS222,136 mi
5
96%-9:15 AMWNW7:27 PMENE1:49 AMS222,782 mi
6
89%-10:13 AMWNW8:34 PMENE2:51 AMS224,617 mi
7
80%-11:02 AMWNW9:42 PMENE3:50 AMS227,386 mi
8
69%-11:45 AMWNW10:49 PMENE4:46 AMS230,757 mi
9
50%-12:22 PMWNW11:53 PME5:38 AMS234,394 mi
10
47%-12:56 PMW-6:27 AMS238,005 mi
11
36%12:55 AME1:27 PMW-7:13 AMS241,373 mi
12
27%1:56 AME1:58 PMW-7:58 AMS244,356 mi
13
18%2:55 AME2:28 PMW-8:42 AMS246,882 mi
14
11%3:53 AMESE3:00 PMWSW-9:27 AMS248,927 mi
15
6%4:50 AMESE3:34 PMWSW-10:12 AMS250,504 mi
16
2%5:46 AMESE4:12 PMWSW-10:59 AMS251,636 mi
17
0%6:40 AMESE4:52 PMWSW-11:46 AMS252,346 mi
18
0%7:32 AMESE5:37 PMWSW-12:35 PMS252,640 mi
19
2%8:21 AMESE6:26 PMWSW-1:23 PMS252,506 mi
20
6%9:06 AMESE7:18 PMWSW-2:12 PMS251,908 mi
21
12%9:47 AMESE8:12 PMWSW-3:00 PMS250,798 mi
22
19%10:25 AMESE9:09 PMWSW-3:46 PMS249,130 mi
23
27%10:59 AMESE10:06 PMWSW-4:32 PMS246,875 mi
24
37%11:32 AME11:05 PMW-5:18 PMS244,038 mi
25
47%12:03 PME--6:03 PMS240,679 mi
26
50%-12:06 AMW12:34 PME6:50 PMS236,927 mi
27
69%-1:09 AMW1:07 PME7:39 PMS232,992 mi
28
79%-2:14 AMW1:43 PMENE8:30 PMS229,162 mi
29
88%-3:22 AMWNW2:23 PMENE9:25 PMS225,783 mi
30
95%-4:32 AMWNW3:08 PMENE10:24 PMS223,220 mi
31
99%-5:43 AMWNW4:02 PMENE11:26 PMS221,788 mi

Humidity Comfort Levels in December 2017 in Healdsburg

Humidity Comfort Levels in December 2017 in Healdsburg18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMNovJan
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The hourly reported humidity comfort level, categorized by dew point. The shaded overlays indicate night and civil twilight.

Wind Speed in December 2017 in Healdsburg

Wind Speed in December 2017 in Healdsburg1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 mph0 mph5 mph5 mph10 mph10 mph15 mph15 mph20 mph20 mph25 mph25 mph30 mph30 mph35 mph35 mph40 mph40 mphNovJan
The daily range of reported wind speeds (gray bars), with maximum gust speeds (red ticks).

Hourly Wind Speed in December 2017 in Healdsburg

Hourly Wind Speed in December 2017 in Healdsburg18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMNovJan
0 mph calm 1 mph light air 4 mph light breeze 8 mph gentle breeze 13 mph moderate breeze 18 mph fresh breeze 25 mph strong breeze 31 mph near gale 39 mph gale 47 mph strong gale 55 mph storm 64 mph violent storm 73 mph hurricane force
The hourly reported wind speed, color coded into bands according to the Beaufort scale. The shaded overlays indicate night and civil twilight.

Hourly Wind Direction in 2017 in Healdsburg

Hourly Wind Direction in 2017 in Healdsburg18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMNovJan
calmnortheastsouthwest
The hourly reported wind direction, color coded by compass point. The shaded overlays indicate night and civil twilight.

Atmospheric Pressure in December 2017 in Healdsburg

Atmospheric Pressure in December 2017 in Healdsburg18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313129.6 inHg29.6 inHg29.8 inHg29.8 inHg30.0 inHg30.0 inHg30.2 inHg30.2 inHg30.4 inHg30.4 inHgNovJan
The daily range of atmospheric pressure (gray bars), as measured by the altimeter setting reported in e.g. a METAR report.

The details of the data sources used for this report can be found on the Sonoma County Airport page.

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