Petersburg, Alaska Weather Conditions

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Current Conditions

  • 61°
  • Mostly Cloudy
  • Wind: SW 7 mph
  • Humidity: 72%
  • Visibility: 10.0 miles
  • Dew Point: 52°
  • Pressure: 30.06 in. 0

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Next 12 Hours

8  pm
11  pm
2  am
5  am
8  am
Mostly Cloudy
Mostly Cloudy
Chance of Rain
Chance of Rain
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Saturday
  • Rain
  • High: 63 °
  • Low: 49 °
  • Rain
  • Sunday
  • Partly Cloudy
  • High: 65 °
  • Low: 51 °
  • Partly Cloudy
  • Monday
  • Chance of Rain
  • High: 66 °
  • Low: 52 °
  • Chance of Rain
  • Tuesday
  • Partly Cloudy
  • High: 68 °
  • Low: 53 °
  • Partly Cloudy
  • Wednesday
  • Chance of Rain
  • High: 66 °
  • Low: 54 °
  • Chance of Rain

Forecast for Petersburg, Alaska

Updated: 4:00 PM AKDT on July 31, 2015

  • Tonight

    Rain in the evening...then scattered showers late...patchy fog late. Lows around 53. Light winds.

  • Saturday

    Cloudy. Scattered showers. Highs around 61. Light winds.

  • Saturday Night

    Mostly cloudy. Scattered showers. Lows around 56. Northwest wind 10 mph.

  • Sunday

    Cloudy. Scattered showers and slight chance of thunderstorms. Highs around 60. Northwest wind 10 mph.

  • Sunday Night

    Cloudy. Isolated showers. Lows around 54. Northwest wind 10 mph.

  • Monday

    Cloudy. Highs around 60.

  • Monday Night

    Cloudy. Scattered showers. Lows around 53.

  • Tuesday and Tuesday Night

    Mostly cloudy. Scattered showers. Highs around 62. Lows around 53.

  • Wednesday

    Cloudy. Highs around 62.

  • Wednesday Night through Thursday Night

    Cloudy. Lows around 54. Highs around 63.

  • Friday

    Cloudy. Chance of rain. Highs around 63.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: 25AE Otness Subdivision, Petersburg, AK

Updated: 7:26 PM AKDT

Temperature: 57.0 °F Dew Point: 56 °F Humidity: 97% Wind: Calm Pressure: 30.02 in Hourly Precipitation: 0.00 in Graphs

Location: Papke's Landing, Petersburg, AK

Updated: 7:17 PM AKDT

Temperature: 60.4 °F Dew Point: 58 °F Humidity: 91% 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 
358 PM akdt Friday Jul 31 2015 

Short term synopsis...a weak upper level trough extends from the 
Yukon territory to the far southwestern Gulf of Alaska. The 
pattern allows moist flow aloft much of the Panhandle but with 
northerly an drier flow aloft over the Yakutat area. This trough 
will very slowly give way to and upper ridge building into the 
Yukon Sat afternoon and evening which will also build a surface 
ridge over the central and eastern Gulf. 


Short this writing...Juneau Hoonah Haines Skagway port 
Alex Wrangell Klawock and Annette are raining. Not much wind. All 
less than 15 knots. 


trapped low level moisture plus rain will cause lots of mvmc and 
even isolated imc conds late tonight and early Sat. Wind in some 
locations will mix enough not to get the fog and scud. 


a ridge building into the Gulf is always a concern for westerlies 
and in this case some north wind in the channels. Models 
typically underestimate the westerlies from the surface ridge so 
upped the wind speed a couple of knots. No big swell outside but 
westerlies do have a long fetch for wind waves outside waters. 


Fire weather...none. We are still soaked and temporarily 
suspended our text products which can resume if we ever get 
drying again. Even a day or two of drying will not get the fuels 
dry enough here. 


Hydrology...toned down the quantitative precipitation forecast on these forecasts as per the 
previous shift. Most gauges are trending downward at the moment 
but a handfull are trending up due to local rainfall. Due to the 
wet pattern we have to watch carefully. Biggest problem child is 
the taiya as per much of this Summer forecasted to get near action 
stage Sunday night. 


Long term...models still indicating a large upper level trough 
extending west-southwest from the NWT of Canada to a location south at the 
start of the extended range forecast period. Models still spinning 
up two upper lows out of this trough by Sunday morning but diverge 
early on with the track of both features. Generally, GFS is more 
progressive with both, as well as with the induced upper ridge 
that forms in between them. Model divergence at the surface first 
manifests by early Tuesday morning, with the slower European model (ecmwf) 
maintaining the vertically stacked feature over the southern 
Panhandle with widespread showers over much of Southeast Alaska. 
Current forecast, while not as heavy handed with the probability 
of showers or the quantitative precipitation forecast amounts, shows a preference for the European model (ecmwf) 
solution and lower confidence in the GFS solution, which differs 
significantly from recent previous model runs. Same thinking 
expresses by wpc in their discussion today. In either solution, 
and in the current extended range forecast, winds remain below 
small craft levels except for brief periods late Sunday night and 
Monday night over northern Lynn Canal. Overall forecast 
confidence limited to average. 


Ajk watches/warnings/advisories... 




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