CodePen Embed - Animated

<div class="hero">

    <div class="snow">
        <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1024 1536" preserveAspectRatio="xMidYMax slice">
        <g fill="#FFF" fill-opacity=".15" transform="translate(55 42)">
         <g id="snow-bottom-layer">
          <ellipse cx="6" cy="1009.5" rx="6" ry="5.5"/>
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         </g>
        </g>
        <g fill="#FFF" fill-opacity=".3" transform="translate(65 63)">
         <g id="snow-top-layer">
          <circle cx="8" cy="776" r="8"/>
          <circle cx="189" cy="925" r="8"/>
          <circle cx="548" cy="844" r="8"/>
          <circle cx="685" cy="1115" r="8"/>
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          <circle cx="874" cy="1438" r="8" transform="rotate(180 874 1438)"/>
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         </g>
        </g>
    </svg>
    </div>
  
  <div class="hero__content">
    <h1>SVG Snow</h1>
  </div>

</div>

@import url('https://fonts.googleapis.com/css?family=Corben:700');

h1 {
  font-family: 'Corben', cursive;
  font-size: 6rem;
  color: white;
  letter-spacing: 0.1rem;
  text-shadow: 0px 3px 3px rgba(0, 0, 0, 0.66);
}

.hero {
  background-image: radial-gradient(50% 176%, #253854 80%, #061922 100%);
  // min-height: 100vh;
  min-height: 30rem;
  position: relative;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-content: center;
  
  &__content {
    position: relative;
    align-self: center;
    padding: 3rem 0;
  }
}

.snow {
  position: absolute;
  min-width: 100vw;
  min-height: 100vh;
  height: 100%;
  width: 100%;
  top: 0;
  left: 0;
}

.snow .svg {
  position: absolute;
  width: 100%;
  height: 100%;
}

#snow-top-layer {
  will-change: transform;
  transform: translateY(-768px);
  animation: fall 22.5s infinite linear;
}

#snow-bottom-layer {
  will-change: transform;
  transform: translateY(-768px);
  animation: fall 45s infinite linear;
}

@keyframes fall {
  
  100% {
    transform: translateY(0);
  }
  
}

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