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Weather Guide

Understanding the forces that shape your daily conditions

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Understanding Weather Forecasts

Modern forecasts use numerical models simulating the atmosphere with physics equations. A 24-hour forecast is now ~95% accurate for temperature. Accuracy drops beyond 7 days due to the chaotic nature of atmospheric systems.

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How Temperature Changes

Temperature cycles are driven by solar angle, cloud cover, altitude and proximity to oceans. Urban areas can be 2–5°C warmer than rural surroundings — the heat island effect — and wind chill makes cold air feel far more intense.

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What Humidity Means

Relative humidity measures water vapour as a percentage of what the air can hold. High humidity impairs the body's cooling through sweating. A heat index above 40°C with high humidity is dangerous for outdoor activity without precaution.

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Why Wind Speed Matters

Wind moves from high to low pressure zones, dispersing pollutants and driving ocean currents. The Beaufort scale (0–12) categorises intensity from calm to hurricane. Even light winds significantly accelerate evaporative cooling on skin.

Frequently Asked Questions

Everything you need to know about weather forecasting

How accurate are weather forecasts?▼

Modern forecasts are accurate up to 5 days — about 80–85% correct for the week ahead. 24-hour forecasts hit roughly 95% accuracy for temperature. Accuracy decreases significantly beyond 7 days due to the chaotic nature of atmospheric dynamics. Local terrain, water bodies and seasonal patterns all affect precision.

What causes temperature changes throughout the day?▼

Daily temperature cycles are driven by solar radiation. Temperatures are lowest just before sunrise and peak in mid-afternoon (2–4 PM) when solar energy accumulation exceeds radiative cooling. Cloud cover, wind patterns and surface type — asphalt vs vegetation — all modulate this natural cycle significantly.

How does humidity affect comfort?▼

High humidity makes hot weather feel hotter because sweat evaporates more slowly, reducing the body's natural cooling. At 100% relative humidity, no evaporation occurs. Cold air with high humidity feels colder because moisture conducts heat away faster. Ideal indoor comfort is 40–60% relative humidity.

What does precipitation chance actually mean?▼

A "40% chance of rain" means there is a 40% probability of measurable precipitation at any given point in the forecast area during that time period. It does not mean it will rain 40% of the time — it is a probabilistic statement about whether rain will occur at all during the forecast window.

Real-Time WeatherFor Any City on Earth

Real-Time Weather
For Any City on Earth