Climate and Average Weather Year Round at Geraldton Airport Australia

At Geraldton Airport, the summers are hot and dry, the winters are cool, and it is windy and mostly clear year round. Over the course of the year, the temperature typically varies from 49°F to 89°F and is rarely below 42°F or above 101°F.

Based on the tourism score, the best time of year to visit Geraldton Airport for warm-weather activities is from mid November to early April.

The hot season lasts for 3.1 months, from December 23 to March 26, with an average daily high temperature above 84°F. The hottest month of the year at Geraldton Airport is February, with an average high of 88°F and low of 68°F.

The cool season lasts for 3.5 months, from June 2 to September 17, with an average daily high temperature below 71°F. The coldest month of the year at Geraldton Airport is July, with an average low of 50°F and high of 66°F.

At Geraldton Airport, 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 Geraldton Airport begins around July 17 and lasts for 7.9 months, ending around March 14.

The clearest month of the year at Geraldton Airport is September, during which on average the sky is clear, mostly clear, or partly cloudy 90% of the time.

The cloudier part of the year begins around March 14 and lasts for 4.1 months, ending around July 17.

The cloudiest month of the year at Geraldton Airport is April, during which on average the sky is overcast or mostly cloudy 28% 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 Geraldton Airport varies throughout the year.

The wetter season lasts 4.1 months, from May 8 to September 12, with a greater than 15% chance of a given day being a wet day. The month with the most wet days at Geraldton Airport is July, with an average of 8.7 days with at least 0.04 inches of precipitation.

The drier season lasts 7.9 months, from September 12 to May 8. The month with the fewest wet days at Geraldton Airport is December, with an average of 0.8 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. The month with the most days of rain alone at Geraldton Airport is July, with an average of 8.7 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 29% on July 11.

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. Geraldton Airport experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 7.3 months, from March 2 to October 11, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain at Geraldton Airport is June, with an average rainfall of 2.7 inches.

The rainless period of the year lasts for 4.7 months, from October 11 to March 2. The month with the least rain at Geraldton Airport is December, with an average rainfall of 0.1 inches.

The length of the day at Geraldton Airport varies over the course of the year. In 2024, the shortest day is June 21, with 10 hours, 18 minutes of daylight; the longest day is December 21, with 13 hours, 59 minutes of daylight.

The earliest sunrise is at 5:15 AM on December 2, and the latest sunrise is 2 hours, 0 minutes later at 7:15 AM on July 1. The earliest sunset is at 5:30 PM on June 9, and the latest sunset is 1 hour, 53 minutes later at 7:24 PM on January 11.

Daylight saving time (DST) is not observed at Geraldton Airport during 2024.

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.

Geraldton Airport experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 4.3 months, from December 16 to April 25, during which time the comfort level is muggy, oppressive, or miserable at least 6% of the time. The month with the most muggy days at Geraldton Airport is February, with 6.8 days that are muggy or worse.

The month with the fewest muggy days at Geraldton Airport is September, with 0.0 days that are muggy or worse.

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 Geraldton Airport experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.2 months, from October 15 to March 20, with average wind speeds of more than 14.0 miles per hour. The windiest month of the year at Geraldton Airport is January, with an average hourly wind speed of 15.9 miles per hour.

The calmer time of year lasts for 6.8 months, from March 20 to October 15. The calmest month of the year at Geraldton Airport is August, with an average hourly wind speed of 12.1 miles per hour.

The predominant average hourly wind direction at Geraldton Airport varies throughout the year.

The wind is most often from the east for 2.6 months, from May 13 to July 31, with a peak percentage of 35% on May 25. The wind is most often from the south for 9.4 months, from July 31 to May 13, with a peak percentage of 75% on January 1.

Geraldton Airport is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.3 months, from January 26 to May 3, with an average temperature above 73°F. The month of the year at Geraldton Airport with the warmest water is March, with an average temperature of 74°F.

The time of year with cooler water lasts for 3.2 months, from July 26 to November 3, with an average temperature below 68°F. The month of the year at Geraldton Airport with the coolest water is September, with an average temperature of 67°F.

To characterize how pleasant the weather is at Geraldton Airport 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 Geraldton Airport for general outdoor tourist activities is from mid November to early April, with a peak score in the last week of December.

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 Geraldton Airport for hot-weather activities is from mid January to mid March, with a peak score in the second week of February.

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).

Temperatures at Geraldton Airport are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

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.

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 3.6 months, from October 27 to February 15, with an average daily incident shortwave energy per square meter above 7.7 kWh. The brightest month of the year at Geraldton Airport is December, with an average of 8.8 kWh.

The darker period of the year lasts for 3.4 months, from May 1 to August 14, with an average daily incident shortwave energy per square meter below 4.3 kWh. The darkest month of the year at Geraldton Airport is June, with an average of 3.3 kWh.

For the purposes of this report, the geographical coordinates of Geraldton Airport are -28.796 deg latitude, 114.704 deg longitude, and 108 ft elevation.

The topography within 2 miles of Geraldton Airport contains only modest variations in elevation, with a maximum elevation change of 213 feet and an average elevation above sea level of 118 feet. Within 10 miles contains only modest variations in elevation (919 feet). Within 50 miles also contains very significant variations in elevation (1,145 feet).

The area within 2 miles of Geraldton Airport is covered by cropland (98%), within 10 miles by cropland (68%) and water (20%), and within 50 miles by water (47%) and cropland (45%).