Horsham

Get the latest weather updates for Horsham. In this section, we've gathered the most recent data, forecasts, and visual charts to help you plan your stay.

The climate in Horsham, much like in most of the UK, is temperate maritime. This means there are no sharp temperature fluctuations, and the weather is generally mild. Throughout the year, there is a clear distinction between the four seasons, each with its own characteristics but without extremes of heat or cold.

Summer, particularly in July and August, offers the warmest weather, with average temperatures around 17-18°C and highs reaching 20-22°C. This is the most comfortable time for walking and outdoor activities. Winters (December–February) are cool, with average temperatures around 5-6.5°C, while minimum temperatures rarely drop significantly below freezing. Spring and autumn are transitional seasons with gradual temperature changes and fairly frequent, though not heavy, precipitation.

A distinctive feature of Horsham's weather, according to the data, is the low amount of precipitation in millimeters (2-3 mm per month), but a relatively high and steady number of rainy days (from 9 to 16 per month). This suggests that heavy downpours are unlikely, but light rain or drizzle can be a frequent occurrence throughout the year. The highest number of rainy days occurs in March, October, and December, which is typical for the region.

Horsham experiences a temperate climate with distinct seasonal temperature changes throughout the year. The warmest months are traditionally July and August. In July, the average temperature is 17.9°C, with average daily highs reaching 21.8°C and nightly lows around 14.0°C. August is slightly cooler, with an average temperature of 17.7°C, a high of 21.4°C, and a low of 13.9°C. The coldest month of the year is January, when the average temperature drops to 5.0°C, the average nightly minimum is 2.4°C, and the daily high is around 7.6°C.

The summer months in Horsham, including June, July, and August, are characterized by pleasantly warm weather. Average daytime temperatures range from 20.1°C in June to 21.8°C in July, creating comfortable conditions for outdoor activities. Nights also remain warm, with temperatures rarely falling below 11.9°C. The winter period, from December to February, features cool but generally mild weather. Average temperatures during these months range from 5.0°C to 6.5°C. Nighttime temperatures can drop to 2.4°C - 4.3°C, but severe frosts are not typical. Maximum daytime temperatures in winter usually range from 7.6°C to 9.1°C.

Data analysis shows notable diurnal temperature fluctuations, especially during the transitional seasons and summer. For example, in May, the difference between the average maximum (16.8°C) and the average minimum (8.3°C) is 8.5°C. A similar pattern is observed in June (an 8.2°C difference) and April (7.9°C). In winter, these fluctuations are somewhat smaller but still noticeable: in January, the difference is 5.2°C, and in December, it is 4.4°C. This means that even on warm days, evenings and nights can be significantly cooler.

Horsham does not have a pronounced rainy season or long dry periods, as the total amount of moisture falling throughout the year remains consistently low. This means that precipitation here usually takes the form of light rain or drizzle rather than heavy downpours.

While the total volume of precipitation changes slightly from month to month—staying mostly at 2 mm (with a small increase to 3 mm in October and December)—the frequency of rainy days varies significantly. The highest number of days with precipitation is observed in March, averaging 16 days. Rain is also relatively frequent in October and December, with about 14 rainy days each. These months can be considered periods with the most frequent, though not heavy, rainfall. The "driest" month in terms of rain frequency is June, which sees an average of only about 9 rainy days.

In winter, especially in January and February, when minimum temperatures drop to 2.4°C - 3.4°C, snow is theoretically possible. However, given the extremely low total precipitation (2 mm in these months), any snowfall is likely to be very light and short-lived, without forming a significant or lasting snow cover. Thus, the primary form of precipitation in Horsham throughout the year is mostly light rain.

When planning a trip to Horsham, it's essential to be prepared for the typically changeable British weather. The key factor is not so much the total amount of precipitation (averaging 2-3 mm per month) as the high probability of it: there are 9 to 16 days with rain every month throughout the year. Therefore, a waterproof jacket (preferably windproof as well) and/or a compact umbrella should be in your suitcase regardless of the season. Don't forget comfortable walking shoes, as Horsham and its surroundings are perfect for exploring on foot. Layering will be your best ally, allowing you to easily adapt to temperature changes throughout the day.

During the summer months from June to August, when average temperatures hover around 16-18°C and highs can reach 20-22°C, light clothing such as T-shirts, shorts, or summer trousers will be useful. However, even in summer, it's worth carrying a light sweater or cardigan for cool evenings or less warm days. On clear days, sunscreen is recommended. In winter, from December to February, the average temperature stays around 5-6°C, so pack warm sweaters, heavy trousers, a hat, scarf, and gloves, as well as a warm waterproof jacket.

Spring (March–May) and autumn (September–November) in Horsham are transitional seasons. Temperatures change gradually: in spring, they rise from an average of 7°C in March to 12-13°C in May, while in autumn, they drop from 15°C in September to 8°C in November. Layered clothing is particularly relevant during these periods. A fleece, jumper, light jacket, or windbreaker will keep you comfortable as you adjust to the whims of the weather.