Weather and climate are getting mixed up quite regularly these days. The aim of this article is to explain what the climate and climatology are. Also, we will go deeper into the differences between climate and climatology and related fields such as meteorology.
It’s understandable that people may confuse weather and climate. The fields are very closely related, as the climate depends on the weather and vice versa. Generally, meteorologists know quite a lot about the climate, whereas climatologists need to have a decent understanding of the weather. Not seldom, climatologists and meteorologists collaborate.
What is the climate?
The climate basically is the average weather in one specific location or area over a certain (long) period of time. Generally, a reference period of 30 years is used to calculate climatological averages. Thirty years is commonly chosen because it is long enough to smooth out extremes that occur in the weather due to (inter)annual variability, but short enough to not be affected too much by changes in the climate system. Climatological averages can tell you how much rain you can typically expect in a month or year in a certain location or what the average temperature for a certain month of the year is.
There are different climate classification systems, of which the Köppen Climate Classification1,2 is the most widely used one. In this system, 5 main climate groups are represented based on seasonal temperature and precipitation characteristics. The five main climate groups are A (tropical), B (arid), C (temperate), D (continental), and E (polar). All climate zones are divided in subgroups. Examples of climates are the humid continental climate (Dfa & Dfb) and Tropical rain forest climate (Af).
Climatological data is generally presented using statistical methods. Climate information is typically visualized through yearly or monthly temperature and precipitation averages, as well as frequency distributions and return periods for specific weather events. In this way, climatology provides insights into the typical weather patterns expected during specific times of the year. It remains however important to note that climatology cannot predict or guarantee the precise weather events that will occur on specific dates. Nevertheless, based on the climatology of a place, you can make an educated guess on what time of the year is likeliest for a particular kind of weather to occur.

Climatology: The study of climate
Climatology is the study of the climate, and therefore also known as climate studies. Generally, climatologists aim to find out how the climate is changing, will change in the future or has changed in the past. Furthermore, the main goal of climatologists is to find out how the climate system works and why the climate changes and varies. Climatological studies typically involve analyzing data, like long-term weather observation datasets, and using models to predict future climate trends. Some applications of climate studies are agriculture, urban planning and natural disaster prevention.
Once more, what are the differences between climate, climatology, weather and meteorology?
Whereas the weather is the current state of the atmosphere in a certain location (like: what is the temperature, is precipitation occurring, etc.), the climate is the average weather over a long period of time. Meteorology is the science of the atmosphere with a focus on weather forecasting. A meteorologist can tell you what the weather tomorrow or the upcoming week approximately will be like, while a climate scientist can for example give you an estimation on how the average summer temperature will change in the next decades. More information on what meteorology and the weather exactly are you can find in this article.
Climate change
The climate has changed in the past and is currently changing as well. The main difference between historical climate change events and the climate change that is occurring nowadays, is that nowadays, the change of the climate is mainly caused by greenhouse gasses that are emitted by humans. This human-induced climate change is also known as anthropogenic climate change. The rate at which the climate is changing due to human activities appears to be way higher than most historical climate change events.
The climate in most places on Earth is warming (also known as global warming). Consequently, weather extremes such as heavy precipitation events or drought are becoming more frequent and extreme, although the extent to which this happens differs per region. And remember: since the weather is the current state of the atmosphere and the climate is the average weather, cold extremes can still occur in a warm climate! Cold events are likely to become more rare in most regions, but when extreme cold occurs, this is not proof that climate change is not happening, since the average temperature is still rising in the majority of the world.
Conclusion
To research and understand how the Earth’s atmospheric system functions, it is important to understand the differences between climate, climatology, and meteorology. Climate is the long-term average weather of a certain place. Climatology is the study of these average weather conditions and their variations. Meteorology, on the other hand, focusses on current and near-furture weather events and the forecasting thereof.
In a changing climate, the continued study of both meteorology and climatology are vital. The importance of meteorology lies in increasing the understanding of the atmosphere and weather systems, which consequently helps with the improvement of weather models and weather forecasting as a whole. Improved weather forecasting will help preparing for and reducing risks related to the extreme weather events, while these will become increasingly frequent in a changing climate.
By studying climatology, we can increase our understanding of the (changing) climate. This will help in estimating risks, and impove decision-making regarding agriculture, urban planning, natural disaster prevention and more.

References:
- Beck, H.E., Zimmermann, N.E., McVicar, T.R., Vergopolan, N., Berg, A. and Wood, E.F., 2018. Present and future Köppen-Geiger climate classification maps at 1-km resolution. Scientific data, 5(1), pp.1-12.
- Köppen, W. and Geiger, R. eds., 1930. Handbuch der klimatologie (Vol. 1). Berlin: Gebrüder Borntraeger.