December Weather in Horsham, Australia

Last updated: February 26, 2025

In Horsham, Australia, December brings a diverse range of temperatures, with a maximum soaring to 46°C (115°F) and an average settling at a comfortable 20°C (68°F). Nights can be cool, dipping to a minimum of 6°C (43°F), creating a striking contrast throughout the month. While the region enjoys relatively low precipitation, recording just 33 mm (1.3 in) over 4 days, the humidity remains steady at 50%, adding to the summer atmosphere. This blend of heat and moisture makes December in Horsham a unique experience for both residents and visitors.

December Temperature in Horsham

In December, Horsham, Australia experiences a remarkable transition into the summer heat, with temperatures reflecting a significant rise. The month kicks off with a minimum of 6°C (43°F), gradually elevating to an average of 20°C (68°F), and peaking at a scorching 46°C (115°F). This pattern highlights a clear trend: as the year winds down towards its final month, Horsham's climate shifts dramatically from mild autumn conditions to the intense warmth characteristic of the southern hemisphere's summer. The rise from November's average of 17°C (63°F) to December's 20°C (68°F) further illustrates this seasonal change, making December not just warmer but also a time for outdoor activities and festive celebrations in the vibrant Australian sun.

December Weather in Horsham: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Horsham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec737067595248474851576368
Data source: Temperature data for Horsham generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Horsham

In Horsham, Australia, December marks a transitional phase in precipitation patterns as the year comes to an end. With an average of 33 mm (1.3 in) of rainfall over 4 days, the month slightly dips compared to the wetter mid-year months, yet maintains a steady rhythm that characterizes the region's climate. Notably, it follows an upward trend from earlier months, with November recording 44 mm (1.7 in) across 6 days, establishing a consistent wet season that enriches the local landscape. The increase in rainfall during the late spring reflects the area's responsiveness to seasonal shifts, culminating in a December that balances both the remnants of the wet season and the warmth of summer ahead. While the intensity of rain may lessen, each drop contributes to the vibrant ecosystem that thrives in Horsham.

December Precipitation Trends in Horsham

The chart displays monthly precipitation patterns in Horsham, with values for each month alongside December's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec231426325037445035484433
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Horsham

In Horsham, Australia, December marks a transition in humidity that reflects significant seasonal shifts. After the peak of 80% in July, humidity levels gradually decline, reaching 50% by December. This seasonal drop is particularly notable after the wetter months of winter, where the air is most saturated, with June and July averaging 79% and 80% respectively. As the year closes, the environment becomes drier, aligning with the warmer summer months ahead. The trend indicates that although humidity in December is still higher than in the hotter months of January (45%) and February (49%), it signifies a move towards lower levels, providing a refreshing contrast to the previous winter’s dampness.

December Average Humidity in Horsham

This chart illustrates the average monthly humidity levels in Horsham, with December's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how December's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec45%49%57%67%75%79%80%75%69%59%56%50%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Horsham

In Horsham, Australia, the December UV Index reaches a striking 15, categorizing it as extreme and resulting in a rapid burn time of just 10 minutes. This marks a notable increase from the preceding months, reflecting a trend where summer brings elevated UV levels. January to November exhibits a consistent pattern of high UV exposure, with the most extreme values occurring during the peak months of January and November, both at 14 and 12, respectively. As we transition into December, the UV Index not only peaks but also highlights the crucial need for sun safety practices. For more detailed insights, visit Horsham UV Index.

Maximum UV Index Levels in Horsham for December

The chart shows the monthly maximum UV Index (UVI) for Horsham in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec141311753357101215
Data source: Horsham December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

December Sunshine in Horsham

In Horsham, Australia, December shines brightly with an impressive 350 hours of sunshine, marking it as the sunniest month of the year. This peak in sunlight follows a robust trend seen since the beginning of summer; after a dip in April and May, when the sunniest days of the year seemed to diminish, the light returns with vigor in the latter part of the year. The sunshine hours gradually increase from October's 276 hours, culminating in December's brilliant display, which outshines even November's 302 hours. This seasonal pattern not only offers longer days for outdoor activities but also highlights the region's delightful summer climate, making Horsham a perfect destination to soak in the sun.

Monthly Sunshine Duration in Horsham: December Highlighted

The December sunshine duration represents the total number of hours Horsham experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec294h302h300h237h214h202h210h224h256h276h302h350h
Data source: Horsham December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Horsham During December

In December, Horsham, Australia basks in a remarkable 74% chance of sunny weather, making it one of the sunniest months of the year. This positive trend is striking when compared to the preceding months; for instance, November only boasts a 39% chance of sunshine, while the colder months of June and July dip to just 30% and 32% respectively. As the year draws to a close, the likelihood of clear skies substantially increases, providing a festive backdrop for outdoor gatherings and seasonal celebrations. With such a significant leap in sunshine probability, December is indeed a delightful month for those who cherish bright and sunny days.

Percentage of Sunny Days in December in Horsham

The chart illustrates the percentage of sunny days in Horsham throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Horsham experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec52%60%54%52%42%30%32%40%40%43%39%74%
Data source: Horsham December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Horsham in December

In Horsham, Australia, the daylight duration experiences a captivating ebb and flow throughout the year, culminating in a delightful peak in December where the days stretch to a generous 14 hours of sunlight. This vibrant month follows a gradual decline from the summer heights of January and November, both also basking in 14 hours of daylight. As the year progresses, a noteworthy trend emerges: daylight decreases steadily from 14 hours in January to a low of 9 hours during the mid-winter months of June and July. However, December marks a return to longer days, hinting at the seasonal cycle where nature prepares to embrace the warmth of summer once again.

Average Daylight Hours in Horsham for December

The chart illustrates the variation in daylight duration in Horsham throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec14h 20m13h 25m12h 16m11h 7m10h 9m9h 40m9h 54m10h 45m11h 51m13h 1m14h 3m14h 36m
Data source: Horsham daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Horsham

As December rolls into Horsham, Australia, the winds pick up slightly, boasting an average speed of 4.3 m/s (10 mph). This pattern marks a return to the breezier months seen earlier in the year. Interestingly, after a gradual decrease from January's robust 4.5 m/s (10 mph), wind speeds dipped through the autumn months, reaching a low of 3.3 m/s (7 mph) in April. However, winds then regained strength, oscillating between 4.1 m/s and 4.3 m/s from September to November, suggesting a vibrant seasonal shift. As we embrace the festive December atmosphere, the sustained breeze not only invigorates the air but also mirrors the energetic spirit of the holiday season, setting a refreshing backdrop for the month ahead.

Average December Wind Speed in Horsham

The chart displays monthly wind speed patterns in Horsham, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec4.54.13.53.33.83.94.33.94.34.04.34.3 m/s
Data source: Horsham December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Horsham Compares to Other Months

The weather in Horsham changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of December's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Horsham and find detailed weather information for every month.

In December, the weather tends to be warmer overall, with average temperatures reaching around 20°C (68°F) and soaring highs of 46°C (115°F). However, it experiences slightly higher humidity at 50% and more precipitation, totaling 33 mm (1.3 in) over four days. In contrast, January sees a slight increase in the minimum temperature at 8°C (46°F) and a higher average of 23°C (73°F), but the maximum temperature is a bit cooler at 44°C (111°F). Additionally, January enjoys lower humidity levels at 45% and less rainfall, with only 23 mm (0.9 in) over three days. For more details on January's climate, you can check Horsham weather in January.

In comparing the weather between December and February, we see some notable differences. December experiences a wider range of temperatures, with a maximum reaching up to 46°C (115°F), while February has a slightly lower maximum of 41°C (107°F). The average temperatures are similar, with December averaging 20°C (68°F) and February slightly warmer at 21°C (70°F). Precipitation is also less frequent in February, totaling just 14 mm (0.6 in) over 2 days, compared to December's 33 mm (1.3 in) over 4 days. Humidity levels remain relatively stable, hovering around 50% in December and 49% in February. For more detailed weather insights, check Horsham weather in February.

In December, the weather is marked by a wider temperature range, with minimums of 6°C (43°F) and maximums soaring to 46°C (115°F), leading to an average of 20°C (68°F). The month experiences some precipitation, totaling 33 mm (1.3 in) over about 4 days, with humidity around 50%. In contrast, March presents slightly cooler conditions, with temperatures ranging from a minimum of 5°C (42°F) to a maximum of 38°C (101°F), averaging at 19°C (67°F). Precipitation decreases to 26 mm (1.0 in) over the same number of days, and humidity increases to 57%. For a more detailed look at March weather specifics, you can check Horsham weather in March.

In December, the weather is significantly warmer with an average temperature of 20°C (68°F) and maximum highs reaching up to 46°C (115°F). The month experiences relatively low precipitation, with only 33 mm (1.3 in) over four days and a humidity level of 50%. In contrast, April sees cooler temperatures, with an average of 15°C (60°F), a minimum of 2°C (35°F), and maximums reaching 35°C (95°F). Precipitation in April is slightly lower at 32 mm (1.2 in) but occurs over five days, contributing to a higher humidity level of 67%. For a more detailed look at the weather during this time, you can check Horsham weather in April.

December weather in Horsham is characterized by higher temperatures, ranging from a minimum of 6°C to a scorching maximum of 46°C, with an average of 20°C. Precipitation is relatively low, averaging about 33 mm over just four days, and the humidity hovers around 50%. In contrast, May brings cooler temperatures, with a minimum of 0°C and a maximum of 25°C, along with an average temperature of 11°C. This month experiences increased precipitation of 50 mm spread across seven days and higher humidity at 75%. For a detailed look at May's conditions, you can visit Horsham weather in May.

In December, the weather is typically warmer, with temperatures ranging from a minimum of 6°C (43°F) to a scorching maximum of 46°C (115°F), averaging around 20°C (68°F). The month sees relatively low precipitation at 33 mm (1.3 in) over about 4 days, accompanied by a moderate humidity level of 50%. In contrast, June experiences much cooler temperatures, with a minimum of -2°C (30°F) and a maximum of 19°C (67°F), averaging only 9°C (48°F). This month also has slightly more rainfall, totaling 37 mm (1.5 in) spread over 7 days, and a higher humidity level of 79%. For more detailed insights into June weather specifically, you can check Horsham weather in June.

When comparing the weather in December and July, notable contrasts emerge. December boasts a significant warmth, with average temperatures reaching up to 20°C (68°F) and highs soaring to 46°C (115°F), albeit with only 33 mm (1.3 in) of precipitation spread over 4 days and a relative humidity of 50%. In stark contrast, July presents a cooler climate, where the average temperature hovers around 8°C (47°F), with temperatures falling as low as -1°C (30°F) and peaking at just 18°C (65°F). July also experiences a higher level of precipitation at 44 mm (1.7 in) over 9 days, accompanied by increased humidity at 80%. For a closer look at the weather specifics during July, check out Horsham weather in July.

When comparing the weather in December and August, it is evident that the two months present vastly different conditions. December boasts a much warmer climate, with temperatures ranging from a minimum of 6°C (43°F) to a scorching maximum of 46°C (115°F), while experiencing relatively low humidity at 50% and only 33 mm of precipitation over four days. In contrast, August is notably cooler, with temperatures dipping as low as -2°C (28°F) and peaking at a comfortable 20°C (68°F). The humidity is significantly higher at 75%, and the month sees more frequent rainfall, accumulating to 50 mm over ten days. For more details about the specific conditions in August, you can visit Horsham weather in August.

When comparing the weather in December and September, there are some notable differences. December experiences significantly warmer temperatures, with a minimum of 6°C (43°F) and a scorching maximum of 46°C (115°F), while September sees cooler conditions, ranging from a chilly -1°C (30°F) to a maximum of 28°C (82°F). Humidity levels are also higher in September at 69%, compared to December's 50%. Additionally, September tends to have more rainy days, with precipitation occurring on 9 days and totaling 35 mm (1.4 in), while December has slightly less precipitation over 4 days, amounting to 33 mm (1.3 in). For more detailed information, you can visit Horsham weather in September.

In comparing December and October weather, December tends to be significantly warmer, with average temperatures ranging from a minimum of 6°C (43°F) to a maximum of 46°C (115°F), compared to October's more moderate range of 1°C (34°F) to 34°C (94°F). December experiences less precipitation, with only 33 mm (1.3 in) falling over about 4 days, while October sees a higher total of 48 mm (1.9 in) spread across 8 days. Additionally, October has a slightly higher humidity at 59% compared to December's 50%. For a more detailed look at October's weather patterns, you can explore Horsham weather in October.

December showcases a significant increase in temperatures compared to November, with the minimum rising from 1°C (34°F) in November to 6°C (43°F) in December. The average temperature in December peaks at 20°C (68°F), slightly warmer than November's 17°C (63°F). The maximum temperature for December can reach an impressive 46°C (115°F), whereas November’s maximum is a more moderate 38°C (101°F). Precipitation decreases from 44 mm (1.7 in) in November, occurring over 6 days, to 33 mm (1.3 in) in December, spread over just 4 days. Despite December’s warmer conditions, humidity slightly decreases from 56% in November to 50% in December. For more insights on November's weather, check out Horsham weather in November.

Compare Horsham's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Horsham

As December unfolds in Horsham, the weather marks a distinct shift from the cooler months, welcoming summer with average temperatures around 20°C. This month is characterized by warmer days, with maximum temperatures soaring to a sweltering 46°C, while nights remain pleasantly mild. Unlike the wetter months, December only sees about 33 mm of precipitation, spread over just a few days, contributing to a relatively dry atmosphere with humidity levels around 50%. This combination of warmth and minimal rain creates an inviting environment perfect for outdoor activities. Discover more about the seasonal variations by visiting Horsham Climate.