Petersburg, Alaska Weather Conditions

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Current Conditions

  • 59°
  • Scattered Clouds
  • Wind: East 4 mph
  • Humidity: 63%
  • Visibility: 10.0 miles
  • Dew Point: 46°
  • Pressure: 30.07 in. 0

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Next 12 Hours

9  pm
12  am
3  am
6  am
9  am
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Chance of Rain
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Chance of Rain
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Wednesday
  • Chance of Rain
  • High: 55 °
  • Low: 44 °
  • Chance of Rain
  • Thursday
  • Partly Cloudy
  • High: 65 °
  • Low: 47 °
  • Partly Cloudy
  • Friday
  • Clear
  • High: 71 °
  • Low: 50 °
  • Clear
  • Saturday
  • Clear
  • High: 73 °
  • Low: 50 °
  • Clear
  • Sunday
  • Clear
  • High: 69 °
  • Low: 49 °
  • Clear

Forecast for Petersburg, Alaska

Updated: 7:05 PM AKDT on January 26, 2015

  • Tuesday

    Light rain late. Lows overnight in the upper 40s.

  • Tuesday Night

    Becoming cloudy with occasional light rain late. Low 48F. Winds light and variable. Chance of rain 60%.

  • Wednesday

    Rain showers early with mostly cloudy conditions later in the day. High around 55F. Winds NW at 5 to 10 mph. Chance of rain 60%.

  • Wednesday Night

    A few clouds from time to time. Low 44F. Winds NW at 5 to 10 mph.

  • Thursday

    Partly cloudy skies. High around 65F. Winds NNW at 5 to 10 mph.

  • Thursday Night

    Clear skies. Low 47F. Winds light and variable.

  • Friday

    Sunny skies. High 71F. Winds light and variable.

  • Friday Night

    Clear skies. Low near 50F. Winds light and variable.

  • Saturday

    Mostly sunny skies. High 73F. Winds light and variable.

  • Saturday Night

    Partly cloudy skies. Low near 50F. Winds light and variable.

  • Sunday

    A mainly sunny sky. High 69F. Winds light and variable.

  • Sunday Night

    A mostly clear sky. Low 49F. Winds light and variable.

  • Monday

    Generally sunny despite a few afternoon clouds. High near 65F. Winds light and variable.

  • Monday Night

    A few clouds. Low 48F. Winds light and variable.

  • Tuesday

    Partly cloudy skies. High 64F. Winds WSW at 5 to 10 mph.

  • Tuesday Night

    Partly cloudy. Low 48F. Winds light and variable.

  • Wednesday

    Intervals of clouds and sunshine. High 64F. Winds WNW at 5 to 10 mph.

  • Wednesday Night

    A few clouds. Low 49F. Winds light and variable.

  • Thursday

    Sunshine and clouds mixed. High around 65F. Winds NW at 5 to 10 mph.

  • Thursday Night

    Partly cloudy skies. Low 49F. Winds light and variable.

  • Friday

    Partly cloudy skies. High 66F. Winds NW at 5 to 10 mph.

  • Friday Night

    Partly cloudy skies early will give way to occasional showers later during the night. Low 51F. Winds light and variable. Chance of rain 50%.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Pearl F Street, Petersburg, AK

Updated: 9:34 PM AKDT

Temperature: 61.2 °F Dew Point: 52 °F Humidity: 72% Wind: North at - Pressure: 30.15 in Hourly Precipitation: - Graphs

Location: 25AE Otness Subdivision, Petersburg, AK

Updated: 9:36 PM AKDT

Temperature: 58.0 °F Dew Point: 49 °F Humidity: 72% Wind: Calm Pressure: 30.02 in Hourly Precipitation: 0.00 in Graphs

Location: Papke's Landing, Petersburg, AK

Updated: 9:35 PM AKDT

Temperature: 56.5 °F Dew Point: 49 °F Humidity: 76% Wind: Calm Pressure: 30.08 in Hourly Precipitation: - Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion

Southeast Alaska forecast discussion 
National Weather Service Juneau Alaska 
222 PM akdt Tuesday may 26 2015 

Short term...upper trough over the Gulf is in process of closing 
off aloft. The resultant upper low will drift east into the Panhandle 
late tonight and Wednesday. High pressure will build over the Gulf later 
tonight and Wednesday in response to upper ridge building northward into that 
area. Used blend of the 12z European model (ecmwf)/Gem/NAM models for the forecast 
through Wednesday. 

Main forecast concerns will be precipitation potential and winds. Right 
now...there is a band of precipitation just offshore the central coastal 
area associated with middle-level front and positive vorticity advection ahead of upper trough. Some 
precipitation is also breaking out just ahead of this band right along 
the central coast. Expect the precipitation band to swing NE across most 
of the northern half of the Panhandle this evening...then settle along 
the Coast Mountains from papg-pajn overnight as upper low moves onshore. 
This will generally persist through most of Wednesday...but a developing 
precipitation band over northern British Columbia will likely drift southwestward into the north-Central 
Area late in the day. Did limit probability of precipitation to likely though as precipitation 
band may thin out some as it comes ashore into a slightly drier 
airmass already in the area this evening...then precipitation may be more 
spotty in nature later tonight into Wednesday. Longest period of likely 
probability of precipitation will be around the pajn area where best upslope and lift will 
persist. Southern area looks like it will only see a few sprinkles 
later tonight and Wednesday...thus kept probability of precipitation on low side there. The paya 
area will probably get clipped by the band moving onshore early 
this evening...then precipitation threat will diminish there later 
tonight and Wednesday but not completely disappear. 

As for winds...they will be on the increase over the Gulf as weak 
to moderate cold advection and building surface high will tighten 
pressure gradient. Expect band of Small Craft Advisory level west-northwest winds Wednesday over 
the northern and eastern Gulf. Some diurnal enhancement to the winds will 
be occurring this evening over the Inner Channels...with Small Craft Advisory 
level S winds likely for far northern Lynn Canal and 15-20 knots in most 
other Inner Channels this evening. They will diminish later in the 
evening before stronger winds behind front aloft come in late 
tonight and Wednesday. Will likely see Small Craft Advisory level westerly winds in Cross 
Sound and southerly winds in northern Lynn Canal Wednesday...with 15-20 knots over 
much of the remaining Inner Channels. 

Otherwise...marine layer will be lifted by the approaching front 
which should raise cloud ceilings for the early evening...but they 
will lower again overnight tonight. Do not think clouds will be as 
low however as boundary layer will be deeper and allow for better 

Long term...models remain in fair agreement for an upper level 
low over the central Panhandle Wednesday night slowly fills and 
drifts southeastward to the southern British Columbia through 
Friday evening. Surface high pressure will continue to dominate 
across the Gulf and an inverted surface trough of low pressure 
will persist east of the coast mountain range. A middle level frontal 
passage associated with the upper low will continue to disorganize 
as it moves southeast Wednesday night into Thursday morning. The 
inverted surface trough will maintain likely probability of precipitation over the east 
central Panhandle Wednesday night...then move south to the 
southern British Columbia by Thursday afternoon. Refreshed the 
inherited forecast with the European model (ecmwf) and Gem for their good consensus 
through Friday evening. 

Dry and seasonably warm weather will return to Southeast Alaska 
late Thursday and continue through early next week as the upper 
ridge continues to build north and surface high anchors over the 
Gulf. Model differences become larger over the weekend an upper 
level shortwave trough develops over the northern Canada and 
slowly digging southwestward. Used the wpc ensemble guidance for 
the remaining long term periods. Expect increasing rain chance 
over the northernmost Panhandle and along the coast mountain range 
from Sunday. Near small craft level west to northwest winds will 
affect the southern outside waters Wednesday night and again late 
Friday. No significant winds are expected across the Inner 


Ajk watches/warnings/advisories... 
Marine...Small Craft Advisory for pkz012-022-041>043-051-052. 




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