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Sling psychrometer
A sling psychrometer holds a wet-bulb thermometer and a dry-bulb thermometer. ... A sling psychrometer can be used to determine the physical and thermal properties of moist air by using standard tables and charts. Typically it is used to determine relative humidity.

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Weather satellite A weather satellite is a type of satellite that is primarily used to monitor the weather and climate of the Earth. Satellites can be polar orbiting (covering the entire Earth asynchronously), or geostationary (hovering over the same spot on the equator).

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Wind vane is an instrument used for showing the direction of the wind.

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Rain gauge
A rain gauge (also known as an udometer, pluviometer, or an ombrometer) is an instrument used by meteorologists and hydrologists to gather and measure the amount of liquid precipitation over an area in a predefined period of time. It is used for determining the depth of precipitation (usually in mm) that occurs over a unit area and thus measuring rainfall amount.

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Hygrometer, instrument used in meteorological science to measure the humidity, or amount of water vapour in the air. Several major types of hygrometers are used to measure humidity.

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Wind sock
is a conically shaped tube made of woven textile which is used to measure both wind direction and speed.

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A barometer is a scientific instrument used to measure atmospheric pressure, also called barometric pressure. These digital barometers are all displaying slightly different readings! The atmosphere is the layers of air wrapped around the Earth.

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Anemometeris a device used to measure the speed and direction of the wind. Which is often used in general weather measurement stations

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A pyranometer is a type of actinometer used for measuring solar irradiance on a planar surface and it is designed to measure the solar radiation flux density (W/m²) from the hemisphere above within a wavelength range 0.3 μm to 3 μm. The name pyranometer stems from the Greek words πῦρ (pyr), meaning "fire", and ἄνω (ano), meaning "above, sky".

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Weather Thermometer used to measure the temperature and this is a very important part of weather forecasting. Many thermometers come in a glass tube that contains a liquid, usually mercury or alcohol. The liquid expands when it's hotter and contracts when it is colder.

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weather balloon use for are the primary source of data above the ground. They provide valuable input for computer forecast models, local data for meteorologists to make forecasts and predict storms, and data for research.