Climate and Average Weather Year Round at Princeton Automatic Weather Reporting System Canada

At Princeton Automatic Weather Reporting System, the summers are comfortable, dry, and partly cloudy and the winters are freezing, snowy, and mostly cloudy. Over the course of the year, the temperature typically varies from 11°F to 78°F and is rarely below -8°F or above 89°F.

Based on the tourism score, the best time of year to visit Princeton Automatic Weather Reporting System for warm-weather activities is from mid July to mid August.

The warm season lasts for 3.1 months, from June 7 to September 10, with an average daily high temperature above 67°F. The hottest month of the year at Princeton Automatic Weather Reporting System is July, with an average high of 76°F and low of 49°F.

The cold season lasts for 3.1 months, from November 16 to February 19, with an average daily high temperature below 32°F. The coldest month of the year at Princeton Automatic Weather Reporting System is January, with an average low of 13°F and high of 23°F.

At Princeton Automatic Weather Reporting System, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year at Princeton Automatic Weather Reporting System begins around June 2 and lasts for 4.1 months, ending around October 4.

The clearest month of the year at Princeton Automatic Weather Reporting System is August, during which on average the sky is clear, mostly clear, or partly cloudy 64% of the time.

The cloudier part of the year begins around October 4 and lasts for 7.9 months, ending around June 2.

The cloudiest month of the year at Princeton Automatic Weather Reporting System is January, during which on average the sky is overcast or mostly cloudy 73% of the time.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Princeton Automatic Weather Reporting System varies throughout the year.

The wetter season lasts 8.7 months, from May 8 to January 29, with a greater than 16% chance of a given day being a wet day. The month with the most wet days at Princeton Automatic Weather Reporting System is June, with an average of 6.6 days with at least 0.04 inches of precipitation.

The drier season lasts 3.3 months, from January 29 to May 8. The month with the fewest wet days at Princeton Automatic Weather Reporting System is April, with an average of 3.2 days with at least 0.04 inches of precipitation.

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 at Princeton Automatic Weather Reporting System changes throughout the year.

Rain alone is the most common for 7.8 months, from March 14 to November 7. The month with the most days of rain alone at Princeton Automatic Weather Reporting System is June, with an average of 6.6 days.

Snow alone is the most common for 4.2 months, from November 7 to March 14. The month with the most days of snow alone at Princeton Automatic Weather Reporting System is December, with an average of 5.6 days.

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. Princeton Automatic Weather Reporting System experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 6.6 months, from April 22 to November 9, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain at Princeton Automatic Weather Reporting System is June, with an average rainfall of 1.3 inches.

The rainless period of the year lasts for 5.4 months, from November 9 to April 22. The month with the least rain at Princeton Automatic Weather Reporting System is January, with an average rainfall of 0.0 inches.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Princeton Automatic Weather Reporting System experiences significant seasonal variation in monthly snowfall.

The snowy period of the year lasts for 5.6 months, from October 11 to March 31, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow at Princeton Automatic Weather Reporting System is December, with an average snowfall of 8.9 inches.

The snowless period of the year lasts for 6.4 months, from March 31 to October 11. The least snow falls around July 30, with an average total accumulation of 0.0 inches.

The length of the day at Princeton Automatic Weather Reporting System varies extremely over the course of the year. In 2024, the shortest day is December 21, with 7 hours, 59 minutes of daylight; the longest day is June 20, with 16 hours, 29 minutes of daylight.

The earliest sunrise is at 4:49 AM on June 17, and the latest sunrise is 3 hours, 14 minutes later at 8:03 AM on December 30. The earliest sunset is at 3:57 PM on December 11, and the latest sunset is 5 hours, 21 minutes later at 9:18 PM on June 24.

Daylight saving time (DST) is observed at Princeton Automatic Weather Reporting System during 2024, starting in the spring on March 10, lasting 7.8 months, and ending in the fall on November 3.

The figure below presents a compact representation of key lunar data for 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

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 at Princeton Automatic Weather Reporting System, 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.

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 at Princeton Automatic Weather Reporting System does not vary significantly over the course of the year, remaining within 0.4 miles per hour of 3.9 miles per hour throughout.

The predominant average hourly wind direction at Princeton Automatic Weather Reporting System varies throughout the year.

The wind is most often from the west for 1.0 weeks, from July 28 to August 4, with a peak percentage of 38% on July 28. The wind is most often from the south for 12 months, from August 4 to July 28, with a peak percentage of 41% on January 1.

To characterize how pleasant the weather is at Princeton Automatic Weather Reporting System 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 Princeton Automatic Weather Reporting System for general outdoor tourist activities is from mid July to mid August, with a peak score in the last week of July.

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 Princeton Automatic Weather Reporting System for hot-weather activities is from mid July to early August, with a peak score in the last week of July.

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.

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 at Princeton Automatic Weather Reporting System typically lasts for 3.9 months (120 days), from around May 17 to around September 14, rarely starting before April 30 or after June 3, and rarely ending before August 30 or after September 29.

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 at Princeton Automatic Weather Reporting System should appear around May 16, only rarely appearing before May 4 or after May 29.

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 3.4 months, from May 7 to August 19, with an average daily incident shortwave energy per square meter above 5.7 kWh. The brightest month of the year at Princeton Automatic Weather Reporting System is July, with an average of 6.9 kWh.

The darker period of the year lasts for 3.8 months, from October 23 to February 16, with an average daily incident shortwave energy per square meter below 2.1 kWh. The darkest month of the year at Princeton Automatic Weather Reporting System is December, with an average of 0.9 kWh.

For the purposes of this report, the geographical coordinates of Princeton Automatic Weather Reporting System are 50.600 deg latitude, -120.517 deg longitude, and 3,524 ft elevation.

The topography within 2 miles of Princeton Automatic Weather Reporting System contains large variations in elevation, with a maximum elevation change of 2,047 feet and an average elevation above sea level of 3,560 feet. Within 10 miles contains large variations in elevation (5,102 feet). Within 50 miles also contains extreme variations in elevation (6,516 feet).

The area within 2 miles of Princeton Automatic Weather Reporting System is covered by trees (90%), within 10 miles by trees (44%) and sparse vegetation (30%), and within 50 miles by trees (60%) and sparse vegetation (21%).