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Average Weather in Salcha Alaska, United States

In Salcha, the summers are long, comfortable, and mostly cloudy and the winters are frigid, snowy, and partly cloudy. Over the course of the year, the temperature typically varies from -13°F to 72°F and is rarely below -41°F or above 82°F.

Climate Summary

frigidfreezingcoldcoolcomfortablecoolfrigidJanFebMarAprMayJunJulAugSepOctNovDec45%45%34%34%overcastclearprecipitation: 2.8 inprecipitation: 2.8 in0.2 in0.2 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 4.0tourism score: 4.00.00.0
Click on each chart for more information.

Based on the tourism score, the best time of year to visit Salcha for warm-weather activities is from late June to late July.

Temperature

The warm season lasts for 4.0 months, from May 10 to September 9, with an average daily high temperature above 58°F. The hottest day of the year is July 3, with an average high of 72°F and low of 52°F.

The cold season lasts for 3.6 months, from November 7 to February 25, with an average daily high temperature below 16°F. The coldest day of the year is January 18, with an average low of -13°F and high of 2°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature

Average Hourly Temperature in SalchaJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMfrigidfrigidcoldcoolcoolcomfortablevery coldfreezingvery coldfreezing
The average hourly temperature, color coded into bands: 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 shaded overlays indicate night and civil twilight.

Sheberta, Russia (3,482 miles away); Зуунмод, Mongolia (3,738 miles); and Mogzon, Russia (3,382 miles) are the far-away foreign places with temperatures most similar to Salcha (view comparison).

Clouds

In Salcha, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year in Salcha begins around February 15 and lasts for 1.6 months, ending around April 2. On March 16, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 45% of the time, and overcast or mostly cloudy 55% of the time.

The cloudier part of the year begins around April 2 and lasts for 10 months, ending around February 15. On September 25, the cloudiest day of the year, the sky is overcast or mostly cloudy 65% of the time, and clear, mostly clear, or partly cloudy 34% of the time.

Cloud Cover Categories

Cloud Cover Categories in SalchaclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Mar 1645%Mar 1645%Sep 2534%Sep 2534%clearmostly clearpartly cloudymostly cloudyovercast
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Salcha varies throughout the year.

The wetter season lasts 4.6 months, from May 23 to October 10, with a greater than 19% chance of a given day being a wet day. The chance of a wet day peaks at 34% on July 12.

The drier season lasts 7.4 months, from October 10 to May 23. The smallest chance of a wet day is 5% on March 22.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation in Salcha changes throughout the year.

Snow alone is the most common for 6.0 months, from October 13 to April 14. The highest chance of a day with snow alone is 12% on January 3.

Rain alone is the most common for 6.0 months, from April 14 to October 13. The highest chance of a day with rain alone is 34% on July 12.

Daily Chance of Precipitation

Daily Chance of Precipitation in SalchasnowrainsnowJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jul 1234%Jul 1234%Mar 225%Mar 225%Oct 1318%Oct 1318%Jan 113%Jan 113%May 2319%May 2319%snowrain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Salcha experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 5.5 months, from May 2 to October 17, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around July 9, with an average total accumulation of 2.8 inches.

The rainless period of the year lasts for 6.5 months, from October 17 to May 2. The least rain falls around December 24, with an average total accumulation of 0.0 inches.

Average Monthly Rainfall

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Snowfall

We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Salcha experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 7.4 months, from September 17 to April 28, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around November 23, with an average total liquid-equivalent accumulation of 0.5 inches.

The snowless period of the year lasts for 4.6 months, from April 28 to September 17. The least snow falls around July 18, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall in SalchasnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.5 in1.0 in1.5 in2.0 in2.5 in3.0 inNov 230.5 inNov 230.5 inJul 180.0 inJul 180.0 inSep 170.1 inSep 170.1 inApr 280.1 inApr 280.1 in
The average liquid-equivalent snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.

Sun

The length of the day in Salcha varies extremely over the course of the year. In 2017, the shortest day is December 21, with 3 hours, 54 minutes of daylight; the longest day is June 20, with 21 hours, 30 minutes of daylight.

Hours of Daylight and Twilight

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.

The earliest sunrise is at 3:04 AM on June 20, and the latest sunrise is 7 hours, 46 minutes later at 10:49 AM on December 24. The earliest sunset is at 2:41 PM on December 18, and the latest sunset is 9 hours, 53 minutes later at 12:34 AM on June 21.

Daylight saving time (DST) is observed in Salcha during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time in SalchaJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 203:04 AMJun 203:04 AM12:34 AMJun 2112:34 AMJun 21Dec 182:41 PMDec 182:41 PM10:49 AMDec 2410:49 AMDec 24Mar 12DSTMar 12DSTDSTNov 5DSTNov 5daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 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. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Humidity

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The perceived humidity level in Salcha, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.

Humidity Comfort Levels

Humidity Comfort Levels in SalchaJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jan 50%Jan 50%Jul 70%Jul 70%drydrycomfortablecomfortable
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Salcha experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 4.3 months, from November 16 to March 26, with average wind speeds of more than 5.0 miles per hour. The windiest day of the year is January 14, with an average hourly wind speed of 6.1 miles per hour.

The calmer time of year lasts for 7.7 months, from March 26 to November 16. The calmest day of the year is July 14, with an average hourly wind speed of 3.8 miles per hour.

Average Wind Speed

Average Wind Speed in SalchawindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mph8 mph9 mph10 mphJan 146.1 mphJan 146.1 mphJul 143.8 mphJul 143.8 mphNov 165.0 mphNov 165.0 mphMar 265.0 mphMar 265.0 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Salcha varies throughout the year.

The wind is most often from the west for 4.6 months, from April 27 to September 16, with a peak percentage of 56% on July 18. The wind is most often from the east for 7.4 months, from September 16 to April 27, with a peak percentage of 54% on January 1.

Wind Direction

Wind Direction in SalchaEWEJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westeastnorthsouth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Best Time of Year to Visit

To characterize how pleasant the weather is in Salcha throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Salcha for general outdoor tourist activities is from late June to late July, with a peak score in the second week of July.

Tourism Score

Tourism Score in SalchaJanFebMarAprMayJunJulAugSepOctNovDec02468104.04.00.00.0 precipitationprecipitationcloudscloudstemperaturetemperaturetourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Salcha for hot-weather activities is from late June to mid July, with a peak score in the first week of July.

Beach/Pool Score

Beach/Pool Score in SalchaJanFebMarAprMayJunJulAugSepOctNovDec02468100.70.70.00.0 precipitationprecipitationcloudscloudstemperaturetemperature
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Growing Season

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Salcha typically lasts for 3.7 months (113 days), from around May 15 to around September 5, rarely starting before April 29 or after May 31, and rarely ending before August 19 or after September 23.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Salchagrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%May 1550%May 1550%Sep 550%Sep 550%May 3190%May 3190%Aug 1990%Aug 1990%Apr 2910%Apr 2910%Sep 2310%Sep 2310%0%Nov 210%Nov 21Jul 9100%Jul 9100%frigidfreezingcoldcoolcomfortablevery cold
The percentage of time spent in various temperature bands: 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 black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms in Salcha should appear around May 22, only rarely appearing before May 13 or after June 2.

Growing Degree Days

Growing Degree Days in SalchaJanFebMarAprMayJunJulAugSepOctNovDec0°F200°F400°F600°F800°F1,000°F1,200°FMay 2290°FMay 2290°FAug 11900°FAug 11900°FDec 311,085°FDec 311,085°F
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.2 months, from April 29 to August 2, with an average daily incident shortwave energy per square meter above 4.5 kWh. The brightest day of the year is June 20, with an average of 5.6 kWh.

The darker period of the year lasts for 4.4 months, from October 14 to February 24, with an average daily incident shortwave energy per square meter below 1.1 kWh. The darkest day of the year is December 22, with an average of 0.0 kWh.

Average Daily Incident Shortwave Solar Energy

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Salcha are 64.524 deg latitude, -146.902 deg longitude, and 768 ft elevation.

The topography within 2 miles of Salcha contains only modest variations in elevation, with a maximum elevation change of 479 feet and an average elevation above sea level of 735 feet. Within 10 miles contains only modest variations in elevation (1,939 feet). Within 50 miles contains very significant variations in elevation (6,660 feet).

The area within 2 miles of Salcha is covered by trees (84%), within 10 miles by trees (89%), and within 50 miles by trees (66%) and shrubs (22%).

Data Sources

This report illustrates the typical weather in Salcha, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Salcha.

For each station, the records are corrected for the elevation difference between that station and Salcha according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Salcha is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Salcha and a given station.

The stations contributing to this reconstruction are: Eielson Air Force Base (88%, 20 kilometers, northwest); Allen Army Air Field (11%, 82 kilometers, southeast); and Healy River Airport (1.1%, 124 kilometers, southwest).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.